<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/BalanceSheetComponentsDetails" xlink:href="por-20190630.xsd#BalanceSheetComponentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/BalanceSheetComponentsElectricUtilityPlantNetDetails" xlink:href="por-20190630.xsd#BalanceSheetComponentsElectricUtilityPlantNetDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/BalanceSheetComponentsNotes" xlink:href="por-20190630.xsd#BalanceSheetComponentsNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/BalanceSheetComponentsOtherCurrentAssetsDetails" xlink:href="por-20190630.xsd#BalanceSheetComponentsOtherCurrentAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/BalanceSheetComponentsOtherCurrentLiabilitiesDetails" xlink:href="por-20190630.xsd#BalanceSheetComponentsOtherCurrentLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/BalanceSheetComponentsPensionAndOtherPostretirementBenefitsDetails" xlink:href="por-20190630.xsd#BalanceSheetComponentsPensionAndOtherPostretirementBenefitsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/BalanceSheetComponentsRegulatoryAssetsAndLiabilitiesDetails" xlink:href="por-20190630.xsd#BalanceSheetComponentsRegulatoryAssetsAndLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/BalanceSheetComponentsTables" xlink:href="por-20190630.xsd#BalanceSheetComponentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/BasisOfPresentationBasisOfPresentationTables" xlink:href="por-20190630.xsd#BasisOfPresentationBasisOfPresentationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/BasisOfPresentationDetails" xlink:href="por-20190630.xsd#BasisOfPresentationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/BasisOfPresentationNotes" xlink:href="por-20190630.xsd#BasisOfPresentationNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/BasisOfPresentationPolicies" xlink:href="por-20190630.xsd#BasisOfPresentationPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/BasisOfPresentationScheduleOfChangesForAdoptionOfNewAccountingPronouncementsDetails" xlink:href="por-20190630.xsd#BasisOfPresentationScheduleOfChangesForAdoptionOfNewAccountingPronouncementsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/CondensedConsolidatedBalanceSheetsUnaudited" xlink:href="por-20190630.xsd#CondensedConsolidatedBalanceSheetsUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical" xlink:href="por-20190630.xsd#CondensedConsolidatedBalanceSheetsUnauditedParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/CondensedConsolidatedStatementsOfCashFlowsUnaudited" xlink:href="por-20190630.xsd#CondensedConsolidatedStatementsOfCashFlowsUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/CondensedConsolidatedStatementsOfIncomeAndComprehensiveIncomeUnaudited" xlink:href="por-20190630.xsd#CondensedConsolidatedStatementsOfIncomeAndComprehensiveIncomeUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/ContingenciesDetails" xlink:href="por-20190630.xsd#ContingenciesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/ContingenciesNotes" xlink:href="por-20190630.xsd#ContingenciesNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/CoverPage" xlink:href="por-20190630.xsd#CoverPage" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/EarningsPerShareComponentsOfEarningsPerShareDetails" xlink:href="por-20190630.xsd#EarningsPerShareComponentsOfEarningsPerShareDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/EarningsPerShareEarningsPerShareDetails" xlink:href="por-20190630.xsd#EarningsPerShareEarningsPerShareDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/EarningsPerShareNotes" xlink:href="por-20190630.xsd#EarningsPerShareNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/EarningsPerShareTables" xlink:href="por-20190630.xsd#EarningsPerShareTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/EquityEquityDetails" xlink:href="por-20190630.xsd#EquityEquityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/EquityNotes" xlink:href="por-20190630.xsd#EquityNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/EquityTables" xlink:href="por-20190630.xsd#EquityTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/FairValueOfFinancialInstrumentsFairValueOfFinancialInstrumentsDetails" xlink:href="por-20190630.xsd#FairValueOfFinancialInstrumentsFairValueOfFinancialInstrumentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/FairValueOfFinancialInstrumentsFairValueOptionsQuantitativeDisclosureDetails" xlink:href="por-20190630.xsd#FairValueOfFinancialInstrumentsFairValueOptionsQuantitativeDisclosureDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/FairValueOfFinancialInstrumentsFinancialAssetsAndLiabilitiesRecognizedAtFairValueDetails" xlink:href="por-20190630.xsd#FairValueOfFinancialInstrumentsFinancialAssetsAndLiabilitiesRecognizedAtFairValueDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/FairValueOfFinancialInstrumentsNotes" xlink:href="por-20190630.xsd#FairValueOfFinancialInstrumentsNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/FairValueOfFinancialInstrumentsTables" xlink:href="por-20190630.xsd#FairValueOfFinancialInstrumentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/FairValueOfFinancialInstrumentsUnobservableInputReconciliationDetails" xlink:href="por-20190630.xsd#FairValueOfFinancialInstrumentsUnobservableInputReconciliationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/GuaranteesNotes" xlink:href="por-20190630.xsd#GuaranteesNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/IncomeTaxEffectiveIncomeTaxRateReconcilitationDetails" xlink:href="por-20190630.xsd#IncomeTaxEffectiveIncomeTaxRateReconcilitationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/IncomeTaxIncomeTaxDetails" xlink:href="por-20190630.xsd#IncomeTaxIncomeTaxDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/IncomeTaxIncomeTaxNotes" xlink:href="por-20190630.xsd#IncomeTaxIncomeTaxNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/IncomeTaxIncomeTaxTables" xlink:href="por-20190630.xsd#IncomeTaxIncomeTaxTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/LeasesDetails" xlink:href="por-20190630.xsd#LeasesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/LeasesFutureMinimumLeasePaymentsDetails" xlink:href="por-20190630.xsd#LeasesFutureMinimumLeasePaymentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/LeasesLeaseCostDetails" xlink:href="por-20190630.xsd#LeasesLeaseCostDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/LeasesLeaseTermAndDiscountRateDetails" xlink:href="por-20190630.xsd#LeasesLeaseTermAndDiscountRateDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/LeasesLeasesNotes" xlink:href="por-20190630.xsd#LeasesLeasesNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/LeasesLeasesPolicies" xlink:href="por-20190630.xsd#LeasesLeasesPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/LeasesLeasesTables" xlink:href="por-20190630.xsd#LeasesLeasesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/LeasesMaturitiesOfLeaseLiabilitiesDetails" xlink:href="por-20190630.xsd#LeasesMaturitiesOfLeaseLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/LeasesSupplementalCashFlowInformationDetails" xlink:href="por-20190630.xsd#LeasesSupplementalCashFlowInformationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/LeasesSupplementalInformationDetails" xlink:href="por-20190630.xsd#LeasesSupplementalInformationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/PriceRiskManagementTables" xlink:href="por-20190630.xsd#PriceRiskManagementTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/RevenueRecognitionDetails" xlink:href="por-20190630.xsd#RevenueRecognitionDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/RevenueRecognitionNotes" xlink:href="por-20190630.xsd#RevenueRecognitionNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/RevenueRecognitionPolicies" xlink:href="por-20190630.xsd#RevenueRecognitionPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/RevenueRecognitionTables" xlink:href="por-20190630.xsd#RevenueRecognitionTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/RiskManagementCounterpartiesRepresenting10OrMoreOfAssetsAndLiabilitiesFromPriceRiskManagementActivitiesDetails" xlink:href="por-20190630.xsd#RiskManagementCounterpartiesRepresenting10OrMoreOfAssetsAndLiabilitiesFromPriceRiskManagementActivitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/RiskManagementCounterpartiesRepresenting10OrMoreOfAssetsAndLiabilitiesFromPriceRiskManagementActivitiesDetailsCalc2" xlink:href="por-20190630.xsd#RiskManagementCounterpartiesRepresenting10OrMoreOfAssetsAndLiabilitiesFromPriceRiskManagementActivitiesDetailsCalc2" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/RiskManagementDetails" xlink:href="por-20190630.xsd#RiskManagementDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/RiskManagementFairValuesOfPriceRiskManagementAssetsAndLiabilitiesDetails" xlink:href="por-20190630.xsd#RiskManagementFairValuesOfPriceRiskManagementAssetsAndLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/RiskManagementFairValuesOfPriceRiskManagementAssetsAndLiabilitiesDetailsCalc2" xlink:href="por-20190630.xsd#RiskManagementFairValuesOfPriceRiskManagementAssetsAndLiabilitiesDetailsCalc2" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/RiskManagementFutureYearNetUnrealizedGainLossRecordedAtBalanceSheetDateExpectedToBecomeRealizedDetails" xlink:href="por-20190630.xsd#RiskManagementFutureYearNetUnrealizedGainLossRecordedAtBalanceSheetDateExpectedToBecomeRealizedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/RiskManagementNetRealizedAndUnrealizedGainsAndLossesOnDerivativeTransactionsDetails" xlink:href="por-20190630.xsd#RiskManagementNetRealizedAndUnrealizedGainsAndLossesOnDerivativeTransactionsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/RiskManagementNetVolumesRelatedToPriceRiskManagementActivitiesDetails" xlink:href="por-20190630.xsd#RiskManagementNetVolumesRelatedToPriceRiskManagementActivitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/RiskManagementNotes" xlink:href="por-20190630.xsd#RiskManagementNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.portlandgeneral.com/role/ScheduleOfStockholdersEquityDetails" xlink:href="por-20190630.xsd#ScheduleOfStockholdersEquityDetails" xlink:type="simple" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/BalanceSheetComponentsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/BalanceSheetComponentsElectricUtilityPlantNetDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet_73987971-d446-86f2-6a5f-eb1fe277f208" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_78662f7f-2a6a-5d68-ba8a-7947ed287be5" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet_73987971-d446-86f2-6a5f-eb1fe277f208" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_78662f7f-2a6a-5d68-ba8a-7947ed287be5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService_402d614f-d54b-9f1d-d560-88bcc4adbbbc" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross_78662f7f-2a6a-5d68-ba8a-7947ed287be5" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService_402d614f-d54b-9f1d-d560-88bcc4adbbbc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress_48a13d8b-0c3b-31fc-c3a7-b1a4b5397d4b" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross_78662f7f-2a6a-5d68-ba8a-7947ed287be5" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress_48a13d8b-0c3b-31fc-c3a7-b1a4b5397d4b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation_daba4c89-1574-43ad-2cdb-6a349ae724c3" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet_73987971-d446-86f2-6a5f-eb1fe277f208" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation_daba4c89-1574-43ad-2cdb-6a349ae724c3" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/BalanceSheetComponentsNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/BalanceSheetComponentsOtherCurrentAssetsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaap_OtherAssetsCurrent_79aabdc0-b963-1fd1-4e81-8c0801b1ebca" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MarginDepositAssets" xlink:label="loc_us-gaap_MarginDepositAssets_6c101a11-0a60-012a-61f2-478ce18427f2" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsCurrent_79aabdc0-b963-1fd1-4e81-8c0801b1ebca" xlink:to="loc_us-gaap_MarginDepositAssets_6c101a11-0a60-012a-61f2-478ce18427f2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_ce9014ac-0ac4-6ed2-b53f-a0edc046d6b4" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsCurrent_79aabdc0-b963-1fd1-4e81-8c0801b1ebca" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_ce9014ac-0ac4-6ed2-b53f-a0edc046d6b4" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_RegulatoryAssetsFromPriceRiskManagementActivities" xlink:label="loc_por_RegulatoryAssetsFromPriceRiskManagementActivities_565f14ea-182e-d662-8f2d-d755a6c51487" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsCurrent_79aabdc0-b963-1fd1-4e81-8c0801b1ebca" xlink:to="loc_por_RegulatoryAssetsFromPriceRiskManagementActivities_565f14ea-182e-d662-8f2d-d755a6c51487" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsMiscellaneous" xlink:label="loc_us-gaap_OtherAssetsMiscellaneous_4a68525a-1fcd-e694-df2e-2cb682f9e792" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsCurrent_79aabdc0-b963-1fd1-4e81-8c0801b1ebca" xlink:to="loc_us-gaap_OtherAssetsMiscellaneous_4a68525a-1fcd-e694-df2e-2cb682f9e792" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/BalanceSheetComponentsOtherCurrentLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_4bcdb937-432e-7a7e-23c2-a441d7b89da5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_b0e2721e-44a1-957d-5aaa-294b580a15e3" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent_4bcdb937-432e-7a7e-23c2-a441d7b89da5" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_b0e2721e-44a1-957d-5aaa-294b580a15e3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestPayableCurrentAndNoncurrent" xlink:label="loc_us-gaap_InterestPayableCurrentAndNoncurrent_6c99b575-18e1-e272-0304-f63a5e5a998b" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent_4bcdb937-432e-7a7e-23c2-a441d7b89da5" xlink:to="loc_us-gaap_InterestPayableCurrentAndNoncurrent_6c99b575-18e1-e272-0304-f63a5e5a998b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsPayableCurrent" xlink:label="loc_us-gaap_DividendsPayableCurrent_fcd06ed7-1009-6ff9-f4dc-4329f4b4725a" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent_4bcdb937-432e-7a7e-23c2-a441d7b89da5" xlink:to="loc_us-gaap_DividendsPayableCurrent_fcd06ed7-1009-6ff9-f4dc-4329f4b4725a" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_OtherCurrentLiabilitiesOther" xlink:label="loc_por_OtherCurrentLiabilitiesOther_9e002157-d30f-e9ce-adef-d755a76c4390" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent_4bcdb937-432e-7a7e-23c2-a441d7b89da5" xlink:to="loc_por_OtherCurrentLiabilitiesOther_9e002157-d30f-e9ce-adef-d755a76c4390" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxesPayableCurrent" xlink:label="loc_us-gaap_TaxesPayableCurrent_e11f4ed8-bba4-2471-6835-a5baa4d63b38" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent_4bcdb937-432e-7a7e-23c2-a441d7b89da5" xlink:to="loc_us-gaap_TaxesPayableCurrent_e11f4ed8-bba4-2471-6835-a5baa4d63b38" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryLiabilityCurrent" xlink:label="loc_us-gaap_RegulatoryLiabilityCurrent_ab86180a-11a3-b67b-ff52-a86c23f6d6c2" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent_4bcdb937-432e-7a7e-23c2-a441d7b89da5" xlink:to="loc_us-gaap_RegulatoryLiabilityCurrent_ab86180a-11a3-b67b-ff52-a86c23f6d6c2" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/BalanceSheetComponentsPensionAndOtherPostretirementBenefitsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_f8c4af80-3396-31ad-927b-214035fcad4c" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_50c65441-5a4a-7b70-8a6f-4bdf84901dd7" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_f8c4af80-3396-31ad-927b-214035fcad4c" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_50c65441-5a4a-7b70-8a6f-4bdf84901dd7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_cc5d4539-1440-3488-daaf-595604d399d2" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_f8c4af80-3396-31ad-927b-214035fcad4c" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_cc5d4539-1440-3488-daaf-595604d399d2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_9eb8402e-17f1-615b-f0e0-f772c38d36ef" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_f8c4af80-3396-31ad-927b-214035fcad4c" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_9eb8402e-17f1-615b-f0e0-f772c38d36ef" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_238da213-7798-05e5-0178-b455f068fdf8" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_f8c4af80-3396-31ad-927b-214035fcad4c" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_238da213-7798-05e5-0178-b455f068fdf8" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/BalanceSheetComponentsRegulatoryAssetsAndLiabilitiesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/BalanceSheetComponentsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/BasisOfPresentationBasisOfPresentationTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/BasisOfPresentationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/BasisOfPresentationNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/BasisOfPresentationPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/BasisOfPresentationScheduleOfChangesForAdoptionOfNewAccountingPronouncementsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/CondensedConsolidatedBalanceSheetsUnaudited" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_63817d40-f759-fa9c-45a5-8bbbb36ed5c9" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_63817d40-f759-fa9c-45a5-8bbbb36ed5c9" xlink:to="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:to="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeLiabilitiesCurrent" xlink:label="loc_us-gaap_DerivativeLiabilitiesCurrent_690493cd-e4bf-5e73-1767-85beb84cea8f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:to="loc_us-gaap_DerivativeLiabilitiesCurrent_690493cd-e4bf-5e73-1767-85beb84cea8f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_4bcdb937-432e-7a7e-23c2-a441d7b89da5" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_4bcdb937-432e-7a7e-23c2-a441d7b89da5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_c2c48170-d0ff-2c37-effc-ff5f53e30dcb" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:to="loc_us-gaap_AccountsPayableCurrent_c2c48170-d0ff-2c37-effc-ff5f53e30dcb" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_0d8925ae-714a-26e4-aa69-2d9eac65a5c6" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:to="loc_us-gaap_LongTermDebtCurrent_0d8925ae-714a-26e4-aa69-2d9eac65a5c6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="loc_us-gaap_ShortTermBorrowings_422d7c41-753d-7765-5880-50978d071d31" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:to="loc_us-gaap_ShortTermBorrowings_422d7c41-753d-7765-5880-50978d071d31" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinanceLeaseLiabilityCurrent" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_1396153e-4fa1-90ea-08ee-fec369a9d7aa" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_1396153e-4fa1-90ea-08ee-fec369a9d7aa" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_fcfc6b17-bfc5-2ebc-3fc1-751aa446a572" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_fcfc6b17-bfc5-2ebc-3fc1-751aa446a572" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryLiabilityNoncurrent" xlink:label="loc_us-gaap_RegulatoryLiabilityNoncurrent_5eb34127-6817-a2f5-95ec-64b2589b8b75" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:to="loc_us-gaap_RegulatoryLiabilityNoncurrent_5eb34127-6817-a2f5-95ec-64b2589b8b75" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_6b1efbc2-e859-9fbd-c572-2f4147498390" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_6b1efbc2-e859-9fbd-c572-2f4147498390" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeLiabilitiesNoncurrent" xlink:label="loc_us-gaap_DerivativeLiabilitiesNoncurrent_7537acaa-8649-0e59-f3d0-d9fe26fabbbc" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:to="loc_us-gaap_DerivativeLiabilitiesNoncurrent_7537acaa-8649-0e59-f3d0-d9fe26fabbbc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_e69973b2-6cb8-6605-6335-92ae4455489c" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_e69973b2-6cb8-6605-6335-92ae4455489c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent_53bd9202-9e30-825a-b9a2-066bdc8e7fc3" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:to="loc_us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent_53bd9202-9e30-825a-b9a2-066bdc8e7fc3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_bba08e5f-78e8-6c25-01a4-6720051135cc" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_bba08e5f-78e8-6c25-01a4-6720051135cc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetRetirementObligation" xlink:label="loc_us-gaap_AssetRetirementObligation_a8156545-81de-1d40-bfcc-d230d6039d52" xlink:type="locator" />
    <link:calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:to="loc_us-gaap_AssetRetirementObligation_a8156545-81de-1d40-bfcc-d230d6039d52" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_a2966f09-089c-308f-404f-2425a9943c5c" xlink:type="locator" />
    <link:calculationArc order="10" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_a2966f09-089c-308f-404f-2425a9943c5c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_e0c0480e-e6f5-c4df-ce25-1ffa4a8c827a" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_63817d40-f759-fa9c-45a5-8bbbb36ed5c9" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_e0c0480e-e6f5-c4df-ce25-1ffa4a8c827a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_ea289a9d-deba-2cde-21e4-3d0ae7a1f011" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_e0c0480e-e6f5-c4df-ce25-1ffa4a8c827a" xlink:to="loc_us-gaap_PreferredStockValue_ea289a9d-deba-2cde-21e4-3d0ae7a1f011" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_aefe3f0c-abe4-5b83-9a64-da77d8e253dd" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_e0c0480e-e6f5-c4df-ce25-1ffa4a8c827a" xlink:to="loc_us-gaap_CommonStockValue_aefe3f0c-abe4-5b83-9a64-da77d8e253dd" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_798442bf-12e1-d944-3fa1-8b797b67482e" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_e0c0480e-e6f5-c4df-ce25-1ffa4a8c827a" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_798442bf-12e1-d944-3fa1-8b797b67482e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_a59bc5ae-63a0-c9bc-32f7-e2bd9f32bd26" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_e0c0480e-e6f5-c4df-ce25-1ffa4a8c827a" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_a59bc5ae-63a0-c9bc-32f7-e2bd9f32bd26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:to="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_928a1618-af56-709a-989c-a303706b8ca2" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_928a1618-af56-709a-989c-a303706b8ca2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EnergyRelatedInventory" xlink:label="loc_us-gaap_EnergyRelatedInventory_d26eeea2-c69c-bbfb-5608-2bec6c0b780a" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:to="loc_us-gaap_EnergyRelatedInventory_d26eeea2-c69c-bbfb-5608-2bec6c0b780a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAssetsCurrent" xlink:label="loc_us-gaap_RegulatoryAssetsCurrent_f032f1d3-9ed6-3542-32b4-ac1c1578a8e9" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:to="loc_us-gaap_RegulatoryAssetsCurrent_f032f1d3-9ed6-3542-32b4-ac1c1578a8e9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaap_OtherAssetsCurrent_79aabdc0-b963-1fd1-4e81-8c0801b1ebca" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:to="loc_us-gaap_OtherAssetsCurrent_79aabdc0-b963-1fd1-4e81-8c0801b1ebca" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnbilledReceivablesCurrent" xlink:label="loc_us-gaap_UnbilledReceivablesCurrent_ecc5021c-19ea-d6df-450c-2c87b2ebe1e7" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:to="loc_us-gaap_UnbilledReceivablesCurrent_ecc5021c-19ea-d6df-450c-2c87b2ebe1e7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_32f41ea9-05c6-e713-464b-586a571d1c1f" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_32f41ea9-05c6-e713-464b-586a571d1c1f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet_73987971-d446-86f2-6a5f-eb1fe277f208" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet_73987971-d446-86f2-6a5f-eb1fe277f208" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAssetsNoncurrent" xlink:label="loc_us-gaap_RegulatoryAssetsNoncurrent_a6df4f8f-6a2d-7d3a-dba3-208afa7d782c" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:to="loc_us-gaap_RegulatoryAssetsNoncurrent_a6df4f8f-6a2d-7d3a-dba3-208afa7d782c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsHeldInTrustNoncurrent" xlink:label="loc_us-gaap_AssetsHeldInTrustNoncurrent_161a5601-77ed-8a05-4bf2-37767b7484ff" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:to="loc_us-gaap_AssetsHeldInTrustNoncurrent_161a5601-77ed-8a05-4bf2-37767b7484ff" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DecommissioningFundInvestments" xlink:label="loc_us-gaap_DecommissioningFundInvestments_b2b3fa25-59d4-e025-9034-17ed8b9511a6" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:to="loc_us-gaap_DecommissioningFundInvestments_b2b3fa25-59d4-e025-9034-17ed8b9511a6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_ddb0d184-2205-2a10-5b0e-faf2ccd717ae" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_ddb0d184-2205-2a10-5b0e-faf2ccd717ae" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/CondensedConsolidatedStatementsOfCashFlowsUnaudited" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_ad8f5587-cd30-97dd-9cf0-81ed4f58516c" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_ad8f5587-cd30-97dd-9cf0-81ed4f58516c" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfDividends" xlink:label="loc_us-gaap_PaymentsOfDividends_13cc8818-e792-6246-5e41-c56e1150a319" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_PaymentsOfDividends_13cc8818-e792-6246-5e41-c56e1150a319" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_38e7f3e2-9d1a-8772-e4aa-fb2cb7d8adc0" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_38e7f3e2-9d1a-8772-e4aa-fb2cb7d8adc0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_60ab1096-bf53-5d61-76bd-431fe857fc03" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_60ab1096-bf53-5d61-76bd-431fe857fc03" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_cfa1e746-5920-c3b5-33ed-a7dee018f26c" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_cfa1e746-5920-c3b5-33ed-a7dee018f26c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfCommercialPaper" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfCommercialPaper_3c48a9b6-eef5-9736-6f3e-28caa9cd34c8" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfCommercialPaper_3c48a9b6-eef5-9736-6f3e-28caa9cd34c8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_ad8f5587-cd30-97dd-9cf0-81ed4f58516c" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_6d89f221-3ede-36b2-fcad-4a4ce1606f6a" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_6d89f221-3ede-36b2-fcad-4a4ce1606f6a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments" xlink:label="loc_us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments_a83cb8b7-22b0-ae08-9c13-0f3ffbed48d6" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:to="loc_us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments_a83cb8b7-22b0-ae08-9c13-0f3ffbed48d6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireInvestments_94ef4f28-36c0-ebcc-c252-3b37968b424e" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:to="loc_us-gaap_PaymentsToAcquireInvestments_94ef4f28-36c0-ebcc-c252-3b37968b424e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_54e087e7-dea1-4188-710c-f95dcb130e6e" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_54e087e7-dea1-4188-710c-f95dcb130e6e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_ad8f5587-cd30-97dd-9cf0-81ed4f58516c" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_b11c1cb0-596b-4c3d-0283-76cef67837c7" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_b11c1cb0-596b-4c3d-0283-76cef67837c7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_e8a9abf2-38d3-77d1-fb6b-693fef632294" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_e8a9abf2-38d3-77d1-fb6b-693fef632294" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitExpense" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitExpense_c8efc986-fd1b-8719-5932-17f55b78353b" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_PensionAndOtherPostretirementBenefitExpense_c8efc986-fd1b-8719-5932-17f55b78353b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity" xlink:label="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_e6805b8d-c095-b84b-4b3a-84164080c52a" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_e6805b8d-c095-b84b-4b3a-84164080c52a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_29b0a481-c653-23c1-27cf-114dadcce1af" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_29b0a481-c653-23c1-27cf-114dadcce1af" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInReceivables" xlink:label="loc_us-gaap_IncreaseDecreaseInReceivables_7357074f-3c04-6e15-2de1-4b57df4c66ed" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInReceivables_7357074f-3c04-6e15-2de1-4b57df4c66ed" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInMarginDepositsOutstanding" xlink:label="loc_us-gaap_IncreaseDecreaseInMarginDepositsOutstanding_89d0258a-5e5c-08d2-d7d9-61f36fd8fadf" xlink:type="locator" />
    <link:calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInMarginDepositsOutstanding_89d0258a-5e5c-08d2-d7d9-61f36fd8fadf" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_0a39d2ee-656d-ead5-a676-41794b4da8f4" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_0a39d2ee-656d-ead5-a676-41794b4da8f4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_a9646808-098c-8496-e17a-df690055019e" xlink:type="locator" />
    <link:calculationArc order="9" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_a9646808-098c-8496-e17a-df690055019e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_d54a644c-3d3c-bcc1-da30-2f136651f90f" xlink:type="locator" />
    <link:calculationArc order="10" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_d54a644c-3d3c-bcc1-da30-2f136651f90f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_334f1d33-7cae-7fd2-9d83-bb387fc2f3dd" xlink:type="locator" />
    <link:calculationArc order="11" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_334f1d33-7cae-7fd2-9d83-bb387fc2f3dd" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_DecouplingMechanismDeferralsNet" xlink:label="loc_por_DecouplingMechanismDeferralsNet_4fe0318c-84a5-7c84-6686-d755a785fc04" xlink:type="locator" />
    <link:calculationArc order="12" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_por_DecouplingMechanismDeferralsNet_4fe0318c-84a5-7c84-6686-d755a785fc04" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions" xlink:label="loc_us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions_6c7ea4f0-dc1c-6be8-5fcb-b68dc276d0aa" xlink:type="locator" />
    <link:calculationArc order="13" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions_6c7ea4f0-dc1c-6be8-5fcb-b68dc276d0aa" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_8aa68cfb-2df7-9a23-d1ed-4fe33385b4a2" xlink:type="locator" />
    <link:calculationArc order="14" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_ProfitLoss_8aa68cfb-2df7-9a23-d1ed-4fe33385b4a2" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/CondensedConsolidatedStatementsOfIncomeAndComprehensiveIncomeUnaudited" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0e67d263-6e0f-cbd4-f553-6c8cebeb68d8" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_254de926-c784-5333-b3ea-41e5ac110b5c" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0e67d263-6e0f-cbd4-f553-6c8cebeb68d8" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_254de926-c784-5333-b3ea-41e5ac110b5c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_8aa68cfb-2df7-9a23-d1ed-4fe33385b4a2" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0e67d263-6e0f-cbd4-f553-6c8cebeb68d8" xlink:to="loc_us-gaap_ProfitLoss_8aa68cfb-2df7-9a23-d1ed-4fe33385b4a2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_19dfad62-5a43-dcc4-04a8-012732c1ed97" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProfitLoss_8aa68cfb-2df7-9a23-d1ed-4fe33385b4a2" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_19dfad62-5a43-dcc4-04a8-012732c1ed97" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_5c890570-5904-7978-36d8-35b96dcf45ab" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_19dfad62-5a43-dcc4-04a8-012732c1ed97" xlink:to="loc_us-gaap_OperatingIncomeLoss_5c890570-5904-7978-36d8-35b96dcf45ab" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_435f940b-a471-4122-5132-a245458f6913" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_5c890570-5904-7978-36d8-35b96dcf45ab" xlink:to="loc_us-gaap_Revenues_435f940b-a471-4122-5132-a245458f6913" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_4562fc03-cbaf-a89b-d454-b9d16c5936b8" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_435f940b-a471-4122-5132-a245458f6913" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_4562fc03-cbaf-a89b-d454-b9d16c5936b8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice_0010a0c7-feb8-c432-0d17-93042d10c540" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_435f940b-a471-4122-5132-a245458f6913" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice_0010a0c7-feb8-c432-0d17-93042d10c540" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="loc_us-gaap_CostsAndExpenses_8823ccfd-55af-348e-39a2-91433072d2c9" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_5c890570-5904-7978-36d8-35b96dcf45ab" xlink:to="loc_us-gaap_CostsAndExpenses_8823ccfd-55af-348e-39a2-91433072d2c9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_a698662c-5d68-9b87-98fe-02485cda58f8" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_8823ccfd-55af-348e-39a2-91433072d2c9" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_a698662c-5d68-9b87-98fe-02485cda58f8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_b11c1cb0-596b-4c3d-0283-76cef67837c7" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_8823ccfd-55af-348e-39a2-91433072d2c9" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_b11c1cb0-596b-4c3d-0283-76cef67837c7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxesExcludingIncomeAndExciseTaxes" xlink:label="loc_us-gaap_TaxesExcludingIncomeAndExciseTaxes_c2403a48-8c07-df78-0759-fb2d2cf1986f" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_8823ccfd-55af-348e-39a2-91433072d2c9" xlink:to="loc_us-gaap_TaxesExcludingIncomeAndExciseTaxes_c2403a48-8c07-df78-0759-fb2d2cf1986f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UtilitiesOperatingExpensePurchasedPower" xlink:label="loc_us-gaap_UtilitiesOperatingExpensePurchasedPower_062ac981-c061-62ac-fb3b-4ff9c521a732" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_8823ccfd-55af-348e-39a2-91433072d2c9" xlink:to="loc_us-gaap_UtilitiesOperatingExpensePurchasedPower_062ac981-c061-62ac-fb3b-4ff9c521a732" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations" xlink:label="loc_us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_fbcdc3ac-66af-2fd3-5bb7-db4832224688" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_8823ccfd-55af-348e-39a2-91433072d2c9" xlink:to="loc_us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_fbcdc3ac-66af-2fd3-5bb7-db4832224688" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_c5398800-6e68-ed86-a47c-16106e0730c2" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_19dfad62-5a43-dcc4-04a8-012732c1ed97" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_c5398800-6e68-ed86-a47c-16106e0730c2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity" xlink:label="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_e6805b8d-c095-b84b-4b3a-84164080c52a" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_c5398800-6e68-ed86-a47c-16106e0730c2" xlink:to="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_e6805b8d-c095-b84b-4b3a-84164080c52a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_41e96f8d-e499-8de8-69a8-27f1c7d4df6e" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_c5398800-6e68-ed86-a47c-16106e0730c2" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_41e96f8d-e499-8de8-69a8-27f1c7d4df6e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_a56b34b7-57ab-a07c-7f03-8366849a14f0" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_19dfad62-5a43-dcc4-04a8-012732c1ed97" xlink:to="loc_us-gaap_InterestExpense_a56b34b7-57ab-a07c-7f03-8366849a14f0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProfitLoss_8aa68cfb-2df7-9a23-d1ed-4fe33385b4a2" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/ContingenciesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/ContingenciesNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/CoverPage" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/EarningsPerShareComponentsOfEarningsPerShareDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/EarningsPerShareEarningsPerShareDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/EarningsPerShareNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/EarningsPerShareTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/EquityEquityDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/EquityNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/EquityTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/FairValueOfFinancialInstrumentsFairValueOfFinancialInstrumentsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/FairValueOfFinancialInstrumentsFairValueOptionsQuantitativeDisclosureDetails" xlink:type="extended">
    <link:loc xlink:href="por-20190630.xsd#por_TotalCommodityContracts" xlink:label="loc_por_TotalCommodityContracts_16b385f3-f87f-08cb-c28b-d755a75cf252" xlink:type="locator" />
    <link:loc xlink:href="por-20190630.xsd#por_ElectricityPhysicalForwardPurchase" xlink:label="loc_por_ElectricityPhysicalForwardPurchase_8970b2af-b0ab-c045-203e-d755a72a6b8e" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_por_TotalCommodityContracts_16b385f3-f87f-08cb-c28b-d755a75cf252" xlink:to="loc_por_ElectricityPhysicalForwardPurchase_8970b2af-b0ab-c045-203e-d755a72a6b8e" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_NaturalGasFinancialSwaps" xlink:label="loc_por_NaturalGasFinancialSwaps_8df8e2de-f837-00ec-7b72-d755a6965822" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_por_TotalCommodityContracts_16b385f3-f87f-08cb-c28b-d755a75cf252" xlink:to="loc_por_NaturalGasFinancialSwaps_8df8e2de-f837-00ec-7b72-d755a6965822" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_FnancialSwapsElectricity" xlink:label="loc_por_FnancialSwapsElectricity_865d02ae-4aab-d802-31e8-d755a6aa4d7d" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_por_TotalCommodityContracts_16b385f3-f87f-08cb-c28b-d755a75cf252" xlink:to="loc_por_FnancialSwapsElectricity_865d02ae-4aab-d802-31e8-d755a6aa4d7d" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/FairValueOfFinancialInstrumentsFinancialAssetsAndLiabilitiesRecognizedAtFairValueDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosure" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_6bae24fb-c89c-2c1d-91e1-c77efe1775f1" xlink:type="locator" />
    <link:loc xlink:href="por-20190630.xsd#por_CommodityContractLiabilitiesElectricity" xlink:label="loc_por_CommodityContractLiabilitiesElectricity_4898ba50-06c8-9004-1dde-d755a7afdec6" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosure_6bae24fb-c89c-2c1d-91e1-c77efe1775f1" xlink:to="loc_por_CommodityContractLiabilitiesElectricity_4898ba50-06c8-9004-1dde-d755a7afdec6" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_CommodityContractLiabilitiesNaturalGas" xlink:label="loc_por_CommodityContractLiabilitiesNaturalGas_de44ff32-da16-c751-b12f-d755a751bdeb" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosure_6bae24fb-c89c-2c1d-91e1-c77efe1775f1" xlink:to="loc_por_CommodityContractLiabilitiesNaturalGas_de44ff32-da16-c751-b12f-d755a751bdeb" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeLiabilities" xlink:label="loc_us-gaap_DerivativeLiabilities_7e8e10f8-8ddc-2b6a-eea7-ea4d306368a1" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosure_6bae24fb-c89c-2c1d-91e1-c77efe1775f1" xlink:to="loc_us-gaap_DerivativeLiabilities_7e8e10f8-8ddc-2b6a-eea7-ea4d306368a1" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/FairValueOfFinancialInstrumentsNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/FairValueOfFinancialInstrumentsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/FairValueOfFinancialInstrumentsUnobservableInputReconciliationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/GuaranteesNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/IncomeTaxEffectiveIncomeTaxRateReconcilitationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_f1b8c80c-fe31-3624-3b0a-70273297561e" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_51d18bf0-0823-2940-9470-e9bbca486da6" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_f1b8c80c-fe31-3624-3b0a-70273297561e" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_51d18bf0-0823-2940-9470-e9bbca486da6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits_928f8c54-624a-8542-b4e3-59da2a4e6af6" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_f1b8c80c-fe31-3624-3b0a-70273297561e" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits_928f8c54-624a-8542-b4e3-59da2a4e6af6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_d23dd313-f50b-59fa-fd80-0dbe24277535" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_f1b8c80c-fe31-3624-3b0a-70273297561e" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_d23dd313-f50b-59fa-fd80-0dbe24277535" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciation" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciation_c71b93e9-8853-9a1d-adba-1b65c6bc6772" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_f1b8c80c-fe31-3624-3b0a-70273297561e" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciation_c71b93e9-8853-9a1d-adba-1b65c6bc6772" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_00f37689-1982-1c68-c80b-43003f810247" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_f1b8c80c-fe31-3624-3b0a-70273297561e" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_00f37689-1982-1c68-c80b-43003f810247" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion_b1d5532b-e566-4363-fe35-36b6be0e0086" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_f1b8c80c-fe31-3624-3b0a-70273297561e" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion_b1d5532b-e566-4363-fe35-36b6be0e0086" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/IncomeTaxIncomeTaxDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/IncomeTaxIncomeTaxNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/IncomeTaxIncomeTaxTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/LeasesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/LeasesFutureMinimumLeasePaymentsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/LeasesLeaseCostDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/LeasesLeaseTermAndDiscountRateDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/LeasesLeasesNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/LeasesLeasesPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/LeasesLeasesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/LeasesMaturitiesOfLeaseLiabilitiesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/LeasesSupplementalCashFlowInformationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/LeasesSupplementalInformationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/PriceRiskManagementTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/RevenueRecognitionDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_435f940b-a471-4122-5132-a245458f6913" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatedOperatingRevenue" xlink:label="loc_us-gaap_RegulatedOperatingRevenue_a9e666e0-4e7e-42ae-5fa7-5ccd56f4c6a7" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_435f940b-a471-4122-5132-a245458f6913" xlink:to="loc_us-gaap_RegulatedOperatingRevenue_a9e666e0-4e7e-42ae-5fa7-5ccd56f4c6a7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatedOperatingRevenueElectricNonNuclear" xlink:label="loc_us-gaap_RegulatedOperatingRevenueElectricNonNuclear_ad5340b2-0b8c-89fa-ad6d-a569c1fe0474" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RegulatedOperatingRevenue_a9e666e0-4e7e-42ae-5fa7-5ccd56f4c6a7" xlink:to="loc_us-gaap_RegulatedOperatingRevenueElectricNonNuclear_ad5340b2-0b8c-89fa-ad6d-a569c1fe0474" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice_0010a0c7-feb8-c432-0d17-93042d10c540" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RegulatedOperatingRevenue_a9e666e0-4e7e-42ae-5fa7-5ccd56f4c6a7" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice_0010a0c7-feb8-c432-0d17-93042d10c540" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredRevenueRevenueRecognized1" xlink:label="loc_us-gaap_DeferredRevenueRevenueRecognized1_eac52c20-98e1-3d5a-caad-f871d028dc4e" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RegulatedOperatingRevenue_a9e666e0-4e7e-42ae-5fa7-5ccd56f4c6a7" xlink:to="loc_us-gaap_DeferredRevenueRevenueRecognized1_eac52c20-98e1-3d5a-caad-f871d028dc4e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnregulatedOperatingRevenue" xlink:label="loc_us-gaap_UnregulatedOperatingRevenue_89ca554b-1e4f-add6-ceda-fbb44d7d07b5" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_435f940b-a471-4122-5132-a245458f6913" xlink:to="loc_us-gaap_UnregulatedOperatingRevenue_89ca554b-1e4f-add6-ceda-fbb44d7d07b5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatedAndUnregulatedOperatingRevenue" xlink:label="loc_us-gaap_RegulatedAndUnregulatedOperatingRevenue_ff9ef388-581a-a2fb-2963-e99dae0a4918" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_435f940b-a471-4122-5132-a245458f6913" xlink:to="loc_us-gaap_RegulatedAndUnregulatedOperatingRevenue_ff9ef388-581a-a2fb-2963-e99dae0a4918" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/RevenueRecognitionNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/RevenueRecognitionPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/RevenueRecognitionTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/RiskManagementCounterpartiesRepresenting10OrMoreOfAssetsAndLiabilitiesFromPriceRiskManagementActivitiesDetails" xlink:type="extended">
    <link:loc xlink:href="por-20190630.xsd#por_ConcentrationOfRiskDerivativeInstrumentsAssets" xlink:label="loc_por_ConcentrationOfRiskDerivativeInstrumentsAssets_dcae1ad6-5aa8-4244-0ec6-d755a77ebb6b" xlink:type="locator" />
    <link:loc xlink:href="por-20190630.xsd#por_CounterpartyA" xlink:label="loc_por_CounterpartyA_904121f4-ca45-4ff2-9c6c-d755a74131cf" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_por_ConcentrationOfRiskDerivativeInstrumentsAssets_dcae1ad6-5aa8-4244-0ec6-d755a77ebb6b" xlink:to="loc_por_CounterpartyA_904121f4-ca45-4ff2-9c6c-d755a74131cf" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_CounterpartyB" xlink:label="loc_por_CounterpartyB_a8568419-3f3e-2a6b-a21f-d755a707c602" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_por_ConcentrationOfRiskDerivativeInstrumentsAssets_dcae1ad6-5aa8-4244-0ec6-d755a77ebb6b" xlink:to="loc_por_CounterpartyB_a8568419-3f3e-2a6b-a21f-d755a707c602" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/RiskManagementCounterpartiesRepresenting10OrMoreOfAssetsAndLiabilitiesFromPriceRiskManagementActivitiesDetailsCalc2" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/RiskManagementDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/RiskManagementFairValuesOfPriceRiskManagementAssetsAndLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:href="por-20190630.xsd#por_DerivativeLiabilitiesTotal" xlink:label="loc_por_DerivativeLiabilitiesTotal_84c38253-e78a-1666-4586-d755a784e026" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue" xlink:label="loc_us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue_b281a3d4-beea-9c2c-bb68-8922e610d46e" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_por_DerivativeLiabilitiesTotal_84c38253-e78a-1666-4586-d755a784e026" xlink:to="loc_us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue_b281a3d4-beea-9c2c-bb68-8922e610d46e" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_CurrentDerivativeLiabilities" xlink:label="loc_por_CurrentDerivativeLiabilities_c925ccdf-16d0-b497-2930-d755a67e3262" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue_b281a3d4-beea-9c2c-bb68-8922e610d46e" xlink:to="loc_por_CurrentDerivativeLiabilities_c925ccdf-16d0-b497-2930-d755a67e3262" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_CommodityContractLiabilityCurrentElectricity" xlink:label="loc_por_CommodityContractLiabilityCurrentElectricity_e136f7c8-b505-e0d5-abf0-d755a6bb98d8" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_por_CurrentDerivativeLiabilities_c925ccdf-16d0-b497-2930-d755a67e3262" xlink:to="loc_por_CommodityContractLiabilityCurrentElectricity_e136f7c8-b505-e0d5-abf0-d755a6bb98d8" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_CommodityContractLiabilityCurrentNaturalGas" xlink:label="loc_por_CommodityContractLiabilityCurrentNaturalGas_22bd1182-2735-a826-382c-d755a7b5febc" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_por_CurrentDerivativeLiabilities_c925ccdf-16d0-b497-2930-d755a67e3262" xlink:to="loc_por_CommodityContractLiabilityCurrentNaturalGas_22bd1182-2735-a826-382c-d755a7b5febc" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_NoncurrentDerivativeLiabilities" xlink:label="loc_por_NoncurrentDerivativeLiabilities_c4057e00-e3b5-b974-a54c-d755a686efcb" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue_b281a3d4-beea-9c2c-bb68-8922e610d46e" xlink:to="loc_por_NoncurrentDerivativeLiabilities_c4057e00-e3b5-b974-a54c-d755a686efcb" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_CommodityContractLiabilityNoncurrentElectricity" xlink:label="loc_por_CommodityContractLiabilityNoncurrentElectricity_650d8b72-542f-4081-fe33-d755a7209f55" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_por_NoncurrentDerivativeLiabilities_c4057e00-e3b5-b974-a54c-d755a686efcb" xlink:to="loc_por_CommodityContractLiabilityNoncurrentElectricity_650d8b72-542f-4081-fe33-d755a7209f55" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_CommodityContractLiabilityNoncurrentNaturalGas" xlink:label="loc_por_CommodityContractLiabilityNoncurrentNaturalGas_0e2413e7-c4f6-0c93-ed01-d755a6dd2822" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_por_NoncurrentDerivativeLiabilities_c4057e00-e3b5-b974-a54c-d755a686efcb" xlink:to="loc_por_CommodityContractLiabilityNoncurrentNaturalGas_0e2413e7-c4f6-0c93-ed01-d755a6dd2822" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_DerivativeAssetsTotal" xlink:label="loc_por_DerivativeAssetsTotal_a71b25c7-df72-5ec5-30ae-d755a6754634" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue" xlink:label="loc_us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue_3ec7414a-8426-8614-4379-2edab98bcfb2" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_por_DerivativeAssetsTotal_a71b25c7-df72-5ec5-30ae-d755a6754634" xlink:to="loc_us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue_3ec7414a-8426-8614-4379-2edab98bcfb2" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_CurrentDerivativeAssets" xlink:label="loc_por_CurrentDerivativeAssets_fe927080-3aa9-c622-801b-d755a6d5d5a2" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue_3ec7414a-8426-8614-4379-2edab98bcfb2" xlink:to="loc_por_CurrentDerivativeAssets_fe927080-3aa9-c622-801b-d755a6d5d5a2" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_CommodityContractAssetCurrentElectricity" xlink:label="loc_por_CommodityContractAssetCurrentElectricity_c54901d5-b28d-a50a-04c7-d755a7490224" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_por_CurrentDerivativeAssets_fe927080-3aa9-c622-801b-d755a6d5d5a2" xlink:to="loc_por_CommodityContractAssetCurrentElectricity_c54901d5-b28d-a50a-04c7-d755a7490224" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_CommodityContractAssetCurrentNaturalGas" xlink:label="loc_por_CommodityContractAssetCurrentNaturalGas_f0f4efa6-6cdd-6f54-740b-d755a6c2ce1e" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_por_CurrentDerivativeAssets_fe927080-3aa9-c622-801b-d755a6d5d5a2" xlink:to="loc_por_CommodityContractAssetCurrentNaturalGas_f0f4efa6-6cdd-6f54-740b-d755a6c2ce1e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeAssetsNoncurrent" xlink:label="loc_us-gaap_DerivativeAssetsNoncurrent_1b627296-6ceb-171f-5c4f-23b7c7421d3f" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue_3ec7414a-8426-8614-4379-2edab98bcfb2" xlink:to="loc_us-gaap_DerivativeAssetsNoncurrent_1b627296-6ceb-171f-5c4f-23b7c7421d3f" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_CommodityContractAssetNoncurrentElectricity" xlink:label="loc_por_CommodityContractAssetNoncurrentElectricity_5c423caa-7b61-125f-8f88-d755a79cd93a" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeAssetsNoncurrent_1b627296-6ceb-171f-5c4f-23b7c7421d3f" xlink:to="loc_por_CommodityContractAssetNoncurrentElectricity_5c423caa-7b61-125f-8f88-d755a79cd93a" xlink:type="arc" />
    <link:loc xlink:href="por-20190630.xsd#por_CommodityContractAssetNoncurrentNaturalGas" xlink:label="loc_por_CommodityContractAssetNoncurrentNaturalGas_945595fa-8074-e57e-e1b6-d755a77b66b2" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeAssetsNoncurrent_1b627296-6ceb-171f-5c4f-23b7c7421d3f" xlink:to="loc_por_CommodityContractAssetNoncurrentNaturalGas_945595fa-8074-e57e-e1b6-d755a77b66b2" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/RiskManagementFairValuesOfPriceRiskManagementAssetsAndLiabilitiesDetailsCalc2" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/RiskManagementFutureYearNetUnrealizedGainLossRecordedAtBalanceSheetDateExpectedToBecomeRealizedDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCommitment" xlink:label="loc_us-gaap_OtherCommitment_01617088-e15d-df87-fac1-8159c99c8265" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCommitmentDueInNextTwelveMonths" xlink:label="loc_us-gaap_OtherCommitmentDueInNextTwelveMonths_0962ec60-8ab6-1cb8-9bed-ee92dfb6b849" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_01617088-e15d-df87-fac1-8159c99c8265" xlink:to="loc_us-gaap_OtherCommitmentDueInNextTwelveMonths_0962ec60-8ab6-1cb8-9bed-ee92dfb6b849" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCommitmentDueInSecondYear" xlink:label="loc_us-gaap_OtherCommitmentDueInSecondYear_0a55f62b-dd36-df29-dde0-6b43aadaa50d" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_01617088-e15d-df87-fac1-8159c99c8265" xlink:to="loc_us-gaap_OtherCommitmentDueInSecondYear_0a55f62b-dd36-df29-dde0-6b43aadaa50d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCommitmentDueInThirdYear" xlink:label="loc_us-gaap_OtherCommitmentDueInThirdYear_1e3f4530-c8c6-e204-389d-78ee78e5bc31" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_01617088-e15d-df87-fac1-8159c99c8265" xlink:to="loc_us-gaap_OtherCommitmentDueInThirdYear_1e3f4530-c8c6-e204-389d-78ee78e5bc31" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCommitmentDueInFourthYear" xlink:label="loc_us-gaap_OtherCommitmentDueInFourthYear_348c6de2-f0e3-1a42-8cc3-6adc90f4f37d" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_01617088-e15d-df87-fac1-8159c99c8265" xlink:to="loc_us-gaap_OtherCommitmentDueInFourthYear_348c6de2-f0e3-1a42-8cc3-6adc90f4f37d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCommitmentDueInFifthYear" xlink:label="loc_us-gaap_OtherCommitmentDueInFifthYear_301aa4c9-532b-55d6-4b33-5a20e9265539" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_01617088-e15d-df87-fac1-8159c99c8265" xlink:to="loc_us-gaap_OtherCommitmentDueInFifthYear_301aa4c9-532b-55d6-4b33-5a20e9265539" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCommitmentDueAfterFifthYear" xlink:label="loc_us-gaap_OtherCommitmentDueAfterFifthYear_9134f0f8-db71-fdd7-2915-2155d1a159af" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_01617088-e15d-df87-fac1-8159c99c8265" xlink:to="loc_us-gaap_OtherCommitmentDueAfterFifthYear_9134f0f8-db71-fdd7-2915-2155d1a159af" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/RiskManagementNetRealizedAndUnrealizedGainsAndLossesOnDerivativeTransactionsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/RiskManagementNetVolumesRelatedToPriceRiskManagementActivitiesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/RiskManagementNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.portlandgeneral.com/role/ScheduleOfStockholdersEquityDetails" xlink:type="extended" />
</link:linkbase>
