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  <xs:element id="noc_EffectiveIncomeTaxRateReconciliationIncreaseinResearchTaxCredits" abstract="false" name="EffectiveIncomeTaxRateReconciliationIncreaseinResearchTaxCredits" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="noc_InitialClaimMember" abstract="true" name="InitialClaimMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="noc_DefinedBenefitPlanPlanAssetsContributionsByEmployerVoluntaryContributions" abstract="false" name="DefinedBenefitPlanPlanAssetsContributionsByEmployerVoluntaryContributions" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_AcceleratedShareRepurchaseSharePrice" abstract="false" name="AcceleratedShareRepurchaseSharePrice" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_UnrecognizedTaxBenefitsOther" abstract="false" name="UnrecognizedTaxBenefitsOther" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_InternationalandOtherCustomersMember" abstract="true" name="InternationalandOtherCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="noc_ITServicesDivestitureNondeductibleGoodwill" abstract="false" name="ITServicesDivestitureNondeductibleGoodwill" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="noc_InternationalCustomerMember" abstract="true" name="InternationalCustomerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_UnpaidPortionsOfContractPriceAndDirectCostsIncurredMember" abstract="true" name="UnpaidPortionsOfContractPriceAndDirectCostsIncurredMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="noc_HighYieldDebtSecuritiesMember" abstract="true" name="HighYieldDebtSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="noc_LesseeOperatingLeaseLeaseNotyetCommencedValue" abstract="false" name="LesseeOperatingLeaseLeaseNotyetCommencedValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_CashUnitsandCashPerformanceUnitsAggregatePayoutAmountTableTextBlock" abstract="false" name="CashUnitsandCashPerformanceUnitsAggregatePayoutAmountTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
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  <xs:element id="noc_DefenseSystemsMember" abstract="true" name="DefenseSystemsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_AcceleratedShareRepurchaseInitialReceiptMonetary" abstract="false" name="AcceleratedShareRepurchaseInitialReceiptMonetary" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="noc_FederalITAndMissionSystemsSupportServicesMember" abstract="true" name="FederalITAndMissionSystemsSupportServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="noc_UnrecognizedTaxBenefitRelatedToMethodsOfAccounting" abstract="false" name="UnrecognizedTaxBenefitRelatedToMethodsOfAccounting" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="noc_StandbyUnusedLettersOfCreditandbankguarantees" abstract="false" name="StandbyUnusedLettersOfCreditandbankguarantees" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="noc_CommercialPaperMaximumBorrowingCapacity" abstract="false" name="CommercialPaperMaximumBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_IncomeTaxReconciliationDeductionsITServicesDivestitureGoodwillPercent" abstract="false" name="IncomeTaxReconciliationDeductionsITServicesDivestitureGoodwillPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="noc_UnallowableStateTaxesAndTransactionsCostsFromDivestiture" abstract="false" name="UnallowableStateTaxesAndTransactionsCostsFromDivestiture" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="noc_CashFlowFromSaleOfEquipmentToACustomer" abstract="false" name="CashFlowFromSaleOfEquipmentToACustomer" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_ActsAndOmissionsWithAdverseAffectsOnPerformanceAndObligationsMember" abstract="true" name="ActsAndOmissionsWithAdverseAffectsOnPerformanceAndObligationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="noc_PriorServiceCostTaxExpense" abstract="false" name="PriorServiceCostTaxExpense" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="noc_A2022NoteInterestRateStatedPercentage" abstract="false" name="A2022NoteInterestRateStatedPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="noc_DefinedBenefitPlanBenefitObligationCashBalanceCreditingRateAssumedforNextFiscalYear" abstract="false" name="DefinedBenefitPlanBenefitObligationCashBalanceCreditingRateAssumedforNextFiscalYear" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="noc_Amountofincreasedecreaseinnetcontractassetsliabilities" abstract="false" name="Amountofincreasedecreaseinnetcontractassetsliabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_UnrecognizedTaxBenefitsRelatedToMethodsOfAccounting451b" abstract="false" name="UnrecognizedTaxBenefitsRelatedToMethodsOfAccounting451b" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_FiveYearTermMemberDomain" abstract="true" name="FiveYearTermMemberDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_TwoThousandFortyFiveMember" abstract="true" name="TwoThousandFortyFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_TwoThousandThirtyMember" abstract="true" name="TwoThousandThirtyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_DefinedBenefitPlanBenefitCostCashBalanceCreditingRateAssumedfornextfiscalyear" abstract="false" name="DefinedBenefitPlanBenefitCostCashBalanceCreditingRateAssumedfornextfiscalyear" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="noc_IncomeTaxReconciliationDeductionsITServicesDivestitureGoodwill" abstract="false" name="IncomeTaxReconciliationDeductionsITServicesDivestitureGoodwill" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_TwoThousandThirtyOneMember" abstract="true" name="TwoThousandThirtyOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_AcceleratedShareRepurchaseRemainingAmount" abstract="false" name="AcceleratedShareRepurchaseRemainingAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_PreTaxGainOnSaleOfBusiness" abstract="false" name="PreTaxGainOnSaleOfBusiness" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_ResearchandDevelopmentasaPercentofSales" abstract="false" name="ResearchandDevelopmentasaPercentofSales" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="noc_OpportunisticFundsMember" abstract="true" name="OpportunisticFundsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_Percentincreasedecreaseinnetcontractassetsliabilities" abstract="false" name="Percentincreasedecreaseinnetcontractassetsliabilities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="noc_TwoThousandFiftyMember" abstract="true" name="TwoThousandFiftyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_RealEstateAndOtherSecuritiesMember" abstract="true" name="RealEstateAndOtherSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_BankLoansMember" abstract="true" name="BankLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_September2015ShareRepurchaseOriginalAuthorizationMember" abstract="true" name="September2015ShareRepurchaseOriginalAuthorizationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_RevenuefromContractwithCustomerPercentage" abstract="false" name="RevenuefromContractwithCustomerPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
</xs:schema>
