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  <xsd:element abstract="true" id="pkg_PackagingCorporationofAmericaMember" name="PackagingCorporationofAmericaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="pkg_PaperMember" name="PaperMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pkg_PensionAndPostretirementBenefitsContributionsExpenseNet" name="PensionAndPostretirementBenefitsContributionsExpenseNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="pkg_PercentageOfCustomerReturnsAllowancesAndEarnedDiscountsToGrossSellingPrice" name="PercentageOfCustomerReturnsAllowancesAndEarnedDiscountsToGrossSellingPrice" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="pkg_PercentageOfHourlyEmployeesRepresentedByUnions" name="PercentageOfHourlyEmployeesRepresentedByUnions" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="pkg_PropertyPlantandEquipmentEstimatedUsefulLivesTableTextBlock" name="PropertyPlantandEquipmentEstimatedUsefulLivesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_QuarterlyFinancialDataLineItems" name="QuarterlyFinancialDataLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability" name="QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_RealestatesecuritiesMember" name="RealestatesecuritiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_ReceivablesAndAccrualsNetMember" name="ReceivablesAndAccrualsNetMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_ReceivablesCreditFacilityMember" name="ReceivablesCreditFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pkg_ReferenceInterestRate" name="ReferenceInterestRate" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="pkg_Refundablestatetaxcredit" name="Refundablestatetaxcredit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="pkg_ReserveForCustomerDeductions" name="ReserveForCustomerDeductions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="pkg_ReservePercentageForCustomerDeductions" name="ReservePercentageForCustomerDeductions" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_ScheduleOfCommitmentsAndContingenciesLineItems" name="ScheduleOfCommitmentsAndContingenciesLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_ScheduleOfCommitmentsAndContingenciesTable" name="ScheduleOfCommitmentsAndContingenciesTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_ScheduleOfDeferredTaxAssetsAndLiabilitiesLineItems" name="ScheduleOfDeferredTaxAssetsAndLiabilitiesLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_ScheduleOfDeferredTaxAssetsAndLiabilitiesTable" name="ScheduleOfDeferredTaxAssetsAndLiabilitiesTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_ScheduleOfIncomeTaxesTable" name="ScheduleOfIncomeTaxesTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="pkg_ScheduleOfNetBenefitCostsAndAmountsRecognizedOtherComprehensiveIncomeLossTableTextBlock" name="ScheduleOfNetBenefitCostsAndAmountsRecognizedOtherComprehensiveIncomeLossTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_ScheduleOfQuarterlyFinancialDataTable" name="ScheduleOfQuarterlyFinancialDataTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_SeniorNotesSixPointFivePercentageSeniorNotesMember" name="SeniorNotesSixPointFivePercentageSeniorNotesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_SeniorNotesThreePointNinePercentageSeniorNotesMember" name="SeniorNotesThreePointNinePercentageSeniorNotesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_ServiceRelatedContributionsMember" name="ServiceRelatedContributionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pkg_ShareRepurchaseProgramTableTextBlock" name="ShareRepurchaseProgramTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="pkg_StockRepurchaseProgramAdditionalAmountAuthorized" name="StockRepurchaseProgramAdditionalAmountAuthorized" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="pkg_TaxCreditCarryforwardUsFederalNonUsAndState" name="TaxCreditCarryforwardUsFederalNonUsAndState" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="pkg_TaxCreditPerGallon" name="TaxCreditPerGallon" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="pkg_TaxRelatedtoCellulosicBiofuelTaxCreditsMember" name="TaxRelatedtoCellulosicBiofuelTaxCreditsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pkg_TermOfSeniorCreditFacilitiesAndNotes" name="TermOfSeniorCreditFacilitiesAndNotes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:positiveIntegerItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_TermloanDueOctober2018Member" name="TermloanDueOctober2018Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_TermloanDueOctober2020Member" name="TermloanDueOctober2020Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pkg_TotalRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLoss" name="TotalRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLoss" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_TotalSecuritiesAtFairValueMember" name="TotalSecuritiesAtFairValueMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pkg_TradeAgreementsPolicyTextBlock" name="TradeAgreementsPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_TwoThousandAndEightInterestRateProtectionAgreementMember" name="TwoThousandAndEightInterestRateProtectionAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_TwoThousandAndElevenInterestRateProtectionAgreementMember" name="TwoThousandAndElevenInterestRateProtectionAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_TwoThousandAndTenInterestRateProtectionAgreementMember" name="TwoThousandAndTenInterestRateProtectionAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_TypeofCostAxis" name="TypeofCostAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_TypeofCostDomain" name="TypeofCostDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_USEquitySecuritiesMember" name="USEquitySecuritiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pkg_UnfundedPortionofInvestmentCommitment" name="UnfundedPortionofInvestmentCommitment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="pkg_UnrecognizedTaxBenefitsTable" name="UnrecognizedTaxBenefitsTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="pkg_UsFederalCapitalLossCarryforwards" name="UsFederalCapitalLossCarryforwards" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="pkg_WhitePapersMember" name="WhitePapersMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_WriteOffofDeferredFinancingCostsMember" name="WriteOffofDeferredFinancingCostsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pkg_Years11through20Member" name="Years11through20Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
