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  <xs:element id="cdw_InventoryFinancingAgreementsAxis" abstract="true" name="InventoryFinancingAgreementsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="cdw_InventoryFinancingAgreementsDomain" abstract="true" name="InventoryFinancingAgreementsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_AccountsPayableInventoryFinancingMember" abstract="true" name="AccountsPayableInventoryFinancingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_InventoryFinancingAgreementsLineItems" abstract="true" name="InventoryFinancingAgreementsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cdw_OtherInventoryFinancingAgreements" abstract="false" name="OtherInventoryFinancingAgreements" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cdw_SeniorUnsecuredRevolvingLoanFacilityMember" abstract="true" name="SeniorUnsecuredRevolvingLoanFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SeniorUnsecuredTermLoanFacilityMember" abstract="true" name="SeniorUnsecuredTermLoanFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SeniorNotesDueMay2025Member" abstract="true" name="SeniorNotesDueMay2025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SeniorNotesDue2026Member" abstract="true" name="SeniorNotesDue2026Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SeniorNotesDueApril2028Member" abstract="true" name="SeniorNotesDueApril2028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SeniorNotesDueDecember2028Member" abstract="true" name="SeniorNotesDueDecember2028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SeniorNotesDue2029Member" abstract="true" name="SeniorNotesDue2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SeniorNotesDue2030Member" abstract="true" name="SeniorNotesDue2030Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SeniorNotesDue2031Member" abstract="true" name="SeniorNotesDue2031Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SeniorNotesDue2034Member" abstract="true" name="SeniorNotesDue2034Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_UnsecuredSeniorNotesMember" abstract="true" name="UnsecuredSeniorNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_ReceivableFinancingLiabilityMember" abstract="true" name="ReceivableFinancingLiabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_OtherLongTermObligationsMember" abstract="true" name="OtherLongTermObligationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_LongtermDebtCurrentMaturitiesGross" abstract="false" name="LongtermDebtCurrentMaturitiesGross" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cdw_LongTermDebtExcludingCurrentMaturitiesNetOfDeferredFinancingCostsDiscountOrPremium" abstract="false" name="LongTermDebtExcludingCurrentMaturitiesNetOfDeferredFinancingCostsDiscountOrPremium" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cdw_AmountOwedUnderRevolvingLoanFinancingAgreement" abstract="false" name="AmountOwedUnderRevolvingLoanFinancingAgreement" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cdw_FinancingReceivableTransfersNotClassifiedAsASale" abstract="false" name="FinancingReceivableTransfersNotClassifiedAsASale" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cdw_CorporateSegmentPrivateSectorBusinessMember" abstract="true" name="CorporateSegmentPrivateSectorBusinessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_NumberOfOperatingSegmentsReportableUnitQuantitativeThresholdNotMet" abstract="false" name="NumberOfOperatingSegmentsReportableUnitQuantitativeThresholdNotMet" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cdw_SegmentReportingCustomerSegmentsCustomerEmployeeHeadcount" abstract="false" name="SegmentReportingCustomerSegmentsCustomerEmployeeHeadcount" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cdw_SmallBusinessMember" abstract="true" name="SmallBusinessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_PublicSegmentGovernmentAgenciesEducationandHealthcareMember" abstract="true" name="PublicSegmentGovernmentAgenciesEducationandHealthcareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_TotalHardwareMember" abstract="true" name="TotalHardwareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SoftwareProductsMember" abstract="true" name="SoftwareProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_ServicesMember" abstract="true" name="ServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_OtherProductsAndServicesMember" abstract="true" name="OtherProductsAndServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SalesChannelCorporateMember" abstract="true" name="SalesChannelCorporateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SalesChannelSmallBusinessMember" abstract="true" name="SalesChannelSmallBusinessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SalesChannelGovernmentMember" abstract="true" name="SalesChannelGovernmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SalesChannelEducationMember" abstract="true" name="SalesChannelEducationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SalesChannelHealthcareMember" abstract="true" name="SalesChannelHealthcareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SalesChannelOtherMember" abstract="true" name="SalesChannelOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_TransferredAtPointInTimePrincipalMember" abstract="true" name="TransferredAtPointInTimePrincipalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_TransferredAtPointInTimeAgentMember" abstract="true" name="TransferredAtPointInTimeAgentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_TransferredOverTimePrincipalMember" abstract="true" name="TransferredOverTimePrincipalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_RevenueNetByProductAndServicePercentage" abstract="false" name="RevenueNetByProductAndServicePercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cdw_NotebooksMobileDevicesMember" abstract="true" name="NotebooksMobileDevicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_NetcommProductsMember" abstract="true" name="NetcommProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_CollaborationMember" abstract="true" name="CollaborationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_DataStorageAndServersMember" abstract="true" name="DataStorageAndServersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_DesktopsMember" abstract="true" name="DesktopsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_OtherHardwareMember" abstract="true" name="OtherHardwareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
