<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:0c0f66b9-6a91-4195-a15b-effe438ca08d,g:30014ba2-7095-4e94-959d-74ce67e4228c-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:noc="http://www.northropgrumman.com/20250630" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.northropgrumman.com/20250630">
  <xs:import namespace="http://fasb.org/srt/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/country/2025" schemaLocation="https://xbrl.sec.gov/country/2025/country-2025.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/ecd/2025" schemaLocation="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="noc-20250630_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="noc-20250630_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="noc-20250630_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="noc-20250630_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="DocumentandEntityInformationDocument" roleURI="http://www.northropgrumman.com/role/DocumentandEntityInformationDocument">
        <link:definition>0000001 - Document - Document and Entity Information Document</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofEarningsandComprehensiveIncomeUnaudited" roleURI="http://www.northropgrumman.com/role/CondensedConsolidatedStatementsofEarningsandComprehensiveIncomeUnaudited">
        <link:definition>9952151 - Statement - Condensed Consolidated Statements of Earnings and Comprehensive Income (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofFinancialPositionUnaudited" roleURI="http://www.northropgrumman.com/role/CondensedConsolidatedStatementsofFinancialPositionUnaudited">
        <link:definition>9952152 - Statement - Condensed Consolidated Statements of Financial Position (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofFinancialPositionUnauditedParentheticals" roleURI="http://www.northropgrumman.com/role/CondensedConsolidatedStatementsofFinancialPositionUnauditedParentheticals">
        <link:definition>9952153 - Statement - Condensed Consolidated Statements of Financial Position (Unaudited) (Parentheticals)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofCashFlowsUnaudited" roleURI="http://www.northropgrumman.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited">
        <link:definition>9952154 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofChangesinShareholdersEquityUnaudited" roleURI="http://www.northropgrumman.com/role/CondensedConsolidatedStatementsofChangesinShareholdersEquityUnaudited">
        <link:definition>9952155 - Statement - Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPoliciesUnaudited" roleURI="http://www.northropgrumman.com/role/SummaryofSignificantAccountingPoliciesUnaudited">
        <link:definition>9952156 - Disclosure - Summary of Significant Accounting Policies (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareShareRepurchasesandDividendsonCommonStockUnaudited" roleURI="http://www.northropgrumman.com/role/EarningsPerShareShareRepurchasesandDividendsonCommonStockUnaudited">
        <link:definition>9952157 - Disclosure - Earnings Per Share, Share Repurchases and Dividends on Common Stock (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InventoryUnaudited" roleURI="http://www.northropgrumman.com/role/InventoryUnaudited">
        <link:definition>9952158 - Disclosure - Inventory (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesUnaudited" roleURI="http://www.northropgrumman.com/role/IncomeTaxesUnaudited">
        <link:definition>9952159 - Disclosure - Income Taxes (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueofFinancialInstrumentsUnaudited" roleURI="http://www.northropgrumman.com/role/FairValueofFinancialInstrumentsUnaudited">
        <link:definition>9952160 - Disclosure - Fair Value of Financial Instruments (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestigationsClaimsandLitigationUnaudited" roleURI="http://www.northropgrumman.com/role/InvestigationsClaimsandLitigationUnaudited">
        <link:definition>9952161 - Disclosure - Investigations, Claims and Litigation (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesUnaudited" roleURI="http://www.northropgrumman.com/role/CommitmentsandContingenciesUnaudited">
        <link:definition>9952162 - Disclosure - Commitments and Contingencies (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RetirementBenefitsUnaudited" roleURI="http://www.northropgrumman.com/role/RetirementBenefitsUnaudited">
        <link:definition>9952163 - Disclosure - Retirement Benefits (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockCompensationPlansandOtherCompensationArrangementsUnaudited" roleURI="http://www.northropgrumman.com/role/StockCompensationPlansandOtherCompensationArrangementsUnaudited">
        <link:definition>9952164 - Disclosure - Stock Compensation Plans and Other Compensation Arrangements (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationUnaudited" roleURI="http://www.northropgrumman.com/role/SegmentInformationUnaudited">
        <link:definition>9952165 - Disclosure - Segment Information (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEvents" roleURI="http://www.northropgrumman.com/role/SubsequentEvents">
        <link:definition>9952166 - Disclosure - Subsequent Events</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPoliciesPolicies" roleURI="http://www.northropgrumman.com/role/SummaryofSignificantAccountingPoliciesPolicies">
        <link:definition>9955511 - Disclosure - Summary of Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPoliciesUnauditedTables" roleURI="http://www.northropgrumman.com/role/SummaryofSignificantAccountingPoliciesUnauditedTables">
        <link:definition>9955512 - Disclosure - Summary of Significant Accounting Policies (Unaudited) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareShareRepurchasesandDividendsonCommonStockUnauditedTables" roleURI="http://www.northropgrumman.com/role/EarningsPerShareShareRepurchasesandDividendsonCommonStockUnauditedTables">
        <link:definition>9955513 - Disclosure - Earnings Per Share, Share Repurchases and Dividends on Common Stock (Unaudited) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InventoryUnauditedTables" roleURI="http://www.northropgrumman.com/role/InventoryUnauditedTables">
        <link:definition>9955514 - Disclosure - Inventory (Unaudited) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesUnauditedTables" roleURI="http://www.northropgrumman.com/role/IncomeTaxesUnauditedTables">
        <link:definition>9955515 - Disclosure - Income Taxes (Unaudited) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueofFinancialInstrumentsUnauditedTables" roleURI="http://www.northropgrumman.com/role/FairValueofFinancialInstrumentsUnauditedTables">
        <link:definition>9955516 - Disclosure - Fair Value of Financial Instruments (Unaudited) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesUnauditedTables" roleURI="http://www.northropgrumman.com/role/CommitmentsandContingenciesUnauditedTables">
        <link:definition>9955517 - Disclosure - Commitments and Contingencies (Unaudited) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RetirementBenefitsUnauditedTables" roleURI="http://www.northropgrumman.com/role/RetirementBenefitsUnauditedTables">
        <link:definition>9955518 - Disclosure - Retirement Benefits (Unaudited) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockCompensationPlansandOtherCompensationArrangementsUnauditedTables" roleURI="http://www.northropgrumman.com/role/StockCompensationPlansandOtherCompensationArrangementsUnauditedTables">
        <link:definition>9955519 - Disclosure - Stock Compensation Plans and Other Compensation Arrangements (Unaudited) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationUnauditedTables" roleURI="http://www.northropgrumman.com/role/SegmentInformationUnauditedTables">
        <link:definition>9955520 - Disclosure - Segment Information (Unaudited) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEventsTables" roleURI="http://www.northropgrumman.com/role/SubsequentEventsTables">
        <link:definition>9955521 - Disclosure - Subsequent Events (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPoliciesUnauditedContractEstimatesDetails2" roleURI="http://www.northropgrumman.com/role/SummaryofSignificantAccountingPoliciesUnauditedContractEstimatesDetails2">
        <link:definition>9955522 - Disclosure - Summary of Significant Accounting Policies (Unaudited) Contract Estimates (Details 2)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPoliciesUnauditedBacklogandContractAssetsandLiabilitiesDetails3" roleURI="http://www.northropgrumman.com/role/SummaryofSignificantAccountingPoliciesUnauditedBacklogandContractAssetsandLiabilitiesDetails3">
        <link:definition>9955523 - Disclosure - Summary of Significant Accounting Policies (Unaudited) Backlog and Contract Assets and Liabilities (Details 3)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPoliciesUnauditedBacklogandContractAssetsandLiabilitiesDetails3_1" roleURI="http://www.northropgrumman.com/role/SummaryofSignificantAccountingPoliciesUnauditedBacklogandContractAssetsandLiabilitiesDetails3_1">
        <link:definition>9955523 - Disclosure - Summary of Significant Accounting Policies (Unaudited) Backlog and Contract Assets and Liabilities (Details 3)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPoliciesUnauditedPropertyPlantandEquipmentDetails4" roleURI="http://www.northropgrumman.com/role/SummaryofSignificantAccountingPoliciesUnauditedPropertyPlantandEquipmentDetails4">
        <link:definition>9955524 - Disclosure - Summary of Significant Accounting Policies (Unaudited) Property Plant and Equipment (Details 4)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPoliciesUnauditedLeasesDetails5" roleURI="http://www.northropgrumman.com/role/SummaryofSignificantAccountingPoliciesUnauditedLeasesDetails5">
        <link:definition>9955525 - Disclosure - Summary of Significant Accounting Policies (Unaudited) Leases (Details 5)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPoliciesUnauditedAccumulatedOtherComprehensiveIncomeLossDetails6" roleURI="http://www.northropgrumman.com/role/SummaryofSignificantAccountingPoliciesUnauditedAccumulatedOtherComprehensiveIncomeLossDetails6">
        <link:definition>9955526 - Disclosure - Summary of Significant Accounting Policies (Unaudited) Accumulated Other Comprehensive Income (Loss) (Details 6)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPoliciesUnauditedDispositionsDetails7" roleURI="http://www.northropgrumman.com/role/SummaryofSignificantAccountingPoliciesUnauditedDispositionsDetails7">
        <link:definition>9955527 - Disclosure - Summary of Significant Accounting Policies (Unaudited) Dispositions (Details 7)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareShareRepurchasesandDividendsonCommonStockUnauditedEarningsPerShareandDividendsDetails1" roleURI="http://www.northropgrumman.com/role/EarningsPerShareShareRepurchasesandDividendsonCommonStockUnauditedEarningsPerShareandDividendsDetails1">
        <link:definition>9955528 - Disclosure - Earnings Per Share, Share Repurchases and Dividends on Common Stock (Unaudited) Earnings Per Share and Dividends (Details 1)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareShareRepurchasesandDividendsonCommonStockUnauditedShareRepurchasesDetails2" roleURI="http://www.northropgrumman.com/role/EarningsPerShareShareRepurchasesandDividendsonCommonStockUnauditedShareRepurchasesDetails2">
        <link:definition>9955529 - Disclosure - Earnings Per Share, Share Repurchases and Dividends on Common Stock (Unaudited) Share Repurchases (Details 2)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InventoryUnauditedDetails" roleURI="http://www.northropgrumman.com/role/InventoryUnauditedDetails">
        <link:definition>9955530 - Disclosure - Inventory (Unaudited) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesUnauditedEffectiveIncomeTaxRateReconciliationDetails1" roleURI="http://www.northropgrumman.com/role/IncomeTaxesUnauditedEffectiveIncomeTaxRateReconciliationDetails1">
        <link:definition>9955531 - Disclosure - Income Taxes (Unaudited) Effective Income Tax Rate Reconciliation (Details 1)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesUnauditedUnrecognizedTaxBenefitDetails2" roleURI="http://www.northropgrumman.com/role/IncomeTaxesUnauditedUnrecognizedTaxBenefitDetails2">
        <link:definition>9955532 - Disclosure - Income Taxes (Unaudited) Unrecognized Tax Benefit (Details 2)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesSubsequentEvent" roleURI="http://www.northropgrumman.com/role/IncomeTaxesSubsequentEvent">
        <link:definition>9955533 - Disclosure - Income Taxes Subsequent Event</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueofFinancialInstrumentsUnauditedDetails1" roleURI="http://www.northropgrumman.com/role/FairValueofFinancialInstrumentsUnauditedDetails1">
        <link:definition>9955534 - Disclosure - Fair Value of Financial Instruments (Unaudited) (Details 1)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AmountsinParagraphsFairValueofFinancialInstrumentsUnauditedDetails2" roleURI="http://www.northropgrumman.com/role/AmountsinParagraphsFairValueofFinancialInstrumentsUnauditedDetails2">
        <link:definition>9955535 - Disclosure - Amounts in Paragraphs - Fair Value of Financial Instruments (Unaudited) (Details 2)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueofFinancialInstrumentsUnauditedLongtermDebtDetails3" roleURI="http://www.northropgrumman.com/role/FairValueofFinancialInstrumentsUnauditedLongtermDebtDetails3">
        <link:definition>9955536 - Disclosure - Fair Value of Financial Instruments (Unaudited) Long-term Debt (Details 3)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestigationsClaimsandLitigationUnauditedDetails" roleURI="http://www.northropgrumman.com/role/InvestigationsClaimsandLitigationUnauditedDetails">
        <link:definition>9955537 - Disclosure - Investigations, Claims and Litigation (Unaudited) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesUnauditedDetails" roleURI="http://www.northropgrumman.com/role/CommitmentsandContingenciesUnauditedDetails">
        <link:definition>9955538 - Disclosure - Commitments and Contingencies (Unaudited) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RetirementBenefitsUnauditedDetails" roleURI="http://www.northropgrumman.com/role/RetirementBenefitsUnauditedDetails">
        <link:definition>9955539 - Disclosure - Retirement Benefits (Unaudited) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockCompensationPlansandOtherCompensationArrangementsUnauditedDetails" roleURI="http://www.northropgrumman.com/role/StockCompensationPlansandOtherCompensationArrangementsUnauditedDetails">
        <link:definition>9955540 - Disclosure - Stock Compensation Plans and Other Compensation Arrangements (Unaudited) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationUnauditedReconciliationtoConsolidatedOperatingIncomeDetails1" roleURI="http://www.northropgrumman.com/role/SegmentInformationUnauditedReconciliationtoConsolidatedOperatingIncomeDetails1">
        <link:definition>9955541 - Disclosure - Segment Information (Unaudited) Reconciliation to Consolidated Operating Income (Details 1)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationUnauditedSalesbyCustomerTypeDetails2" roleURI="http://www.northropgrumman.com/role/SegmentInformationUnauditedSalesbyCustomerTypeDetails2">
        <link:definition>9955542 - Disclosure - Segment Information (Unaudited) Sales by Customer Type (Details 2)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationUnauditedSalesbyContractTypeDetails3" roleURI="http://www.northropgrumman.com/role/SegmentInformationUnauditedSalesbyContractTypeDetails3">
        <link:definition>9955543 - Disclosure - Segment Information (Unaudited) Sales by Contract Type (Details 3)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationUnauditedSalesbyGeographicLocationDetails4" roleURI="http://www.northropgrumman.com/role/SegmentInformationUnauditedSalesbyGeographicLocationDetails4">
        <link:definition>9955544 - Disclosure - Segment Information (Unaudited) Sales by Geographic Location (Details 4)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationUnauditedCapitalExpendituresandDepreciationandAmortizationDetails5" roleURI="http://www.northropgrumman.com/role/SegmentInformationUnauditedCapitalExpendituresandDepreciationandAmortizationDetails5">
        <link:definition>9955545 - Disclosure - Segment Information (Unaudited) Capital Expenditures and Depreciation and Amortization (Details 5)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEventsDetails" roleURI="http://www.northropgrumman.com/role/SubsequentEventsDetails">
        <link:definition>9955546 - Disclosure - Subsequent Events (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="noc_DocumentAndEntityInformationAbstract" abstract="true" name="DocumentAndEntityInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="noc_NonOperatingFASPensionBenefit" abstract="false" name="NonOperatingFASPensionBenefit" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_OtherComprehensiveIncomeLossOtherComponentsNetOfTax" abstract="false" name="OtherComprehensiveIncomeLossOtherComponentsNetOfTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_GovernmentCostClaimsPolicyTextBlock" abstract="false" name="GovernmentCostClaimsPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="noc_ScheduleOfIncomeTaxExpenseAndEffectiveIncomeTaxRatesTableTextBlock" abstract="false" name="ScheduleOfIncomeTaxExpenseAndEffectiveIncomeTaxRatesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="noc_EnvironmentalRemediationRangeofFutureCostsTable" abstract="true" name="EnvironmentalRemediationRangeofFutureCostsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="noc_EnvironmentalRemediationRangeofFutureCostsLineItems" abstract="true" name="EnvironmentalRemediationRangeofFutureCostsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="noc_EnvironmentalRemediationTableTextBlock" abstract="false" name="EnvironmentalRemediationTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="noc_CashUnitsandCashPerformanceUnitsAggregatePayoutAmountTableTextBlock" abstract="false" name="CashUnitsandCashPerformanceUnitsAggregatePayoutAmountTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="noc_B21ProgramLRIPOptions15Member" abstract="true" name="B21ProgramLRIPOptions15Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_B21ProgramLRIPOptions12Member" abstract="true" name="B21ProgramLRIPOptions12Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_B21ProgramLRIPOptions35Member" abstract="true" name="B21ProgramLRIPOptions35Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_SentinelEMDPhaseMember" abstract="true" name="SentinelEMDPhaseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_AeronauticsSystemsMember" abstract="true" name="AeronauticsSystemsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_SpaceSystemsMember" abstract="true" name="SpaceSystemsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_BacklogAwardsAndRelatedAdjustmentsTable" abstract="true" name="BacklogAwardsAndRelatedAdjustmentsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="noc_RestrictedSpaceMember" abstract="true" name="RestrictedSpaceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_NGIProgramMember" abstract="true" name="NGIProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_TrainingServicesBusinessMember" abstract="true" name="TrainingServicesBusinessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_BacklogAwardsAndRelatedAdjustmentsLineItems" abstract="true" name="BacklogAwardsAndRelatedAdjustmentsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="noc_BacklogReductionDueToDivestiture" abstract="false" name="BacklogReductionDueToDivestiture" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_AccumulatedOtherComprehensiveIncomeLossOtherComponentsNetOfTax" abstract="false" name="AccumulatedOtherComprehensiveIncomeLossOtherComponentsNetOfTax" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_IncreaseDecreaseinStockDividendPercentage" abstract="false" name="IncreaseDecreaseinStockDividendPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="noc_January2022ShareRepurchaseProgramMember" abstract="true" name="January2022ShareRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_December2023ShareRepurchaseProgramMember" abstract="true" name="December2023ShareRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_December2024ShareRepurchaseProgramMember" abstract="true" name="December2024ShareRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_A2022RepurchaseProgramCompletionDate" abstract="false" name="A2022RepurchaseProgramCompletionDate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="noc_ShareRepurchasesTableAbstract" abstract="true" name="ShareRepurchasesTableAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="noc_Q12024ASRMember" abstract="true" name="Q12024ASRMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_AcceleratedShareRepurchaseInitialReceiptShares" abstract="false" name="AcceleratedShareRepurchaseInitialReceiptShares" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="noc_AcceleratedShareRepurchaseFinalReceiptShares" abstract="false" name="AcceleratedShareRepurchaseFinalReceiptShares" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="noc_ChangeInFederalAndForeignIncomeTaxExpense" abstract="false" name="ChangeInFederalAndForeignIncomeTaxExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_ChangeInFederalAndForeignIncomeTaxExpensePercent" abstract="false" name="ChangeInFederalAndForeignIncomeTaxExpensePercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="noc_TaxExpenseNondeductibleGoodwillAmount" abstract="false" name="TaxExpenseNondeductibleGoodwillAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_NatureOfUnrecognizedTaxBenefitsAxis" abstract="true" name="NatureOfUnrecognizedTaxBenefitsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="noc_NatureOfUnrecognizedTaxBenefitsDomain" abstract="true" name="NatureOfUnrecognizedTaxBenefitsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_IRCSection451bMember" abstract="true" name="IRCSection451bMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_ExpectedETRduetoOBBBA" abstract="false" name="ExpectedETRduetoOBBBA" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="noc_LowRangeCashTaxImpactofOBBBA" abstract="false" name="LowRangeCashTaxImpactofOBBBA" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_HighRangeCashTaxImpactofOBBBA" abstract="false" name="HighRangeCashTaxImpactofOBBBA" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_A2029NotesMember" abstract="true" name="A2029NotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_A2034NotesMember" abstract="true" name="A2034NotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_A2054NotesMember" abstract="true" name="A2054NotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_A2025NotesMember" abstract="true" name="A2025NotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_A2030NotesMember" abstract="true" name="A2030NotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_A2035NotesMember" abstract="true" name="A2035NotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_MinimumLossContingencyMember" abstract="true" name="MinimumLossContingencyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_MaximumLossContingencyMember" abstract="true" name="MaximumLossContingencyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_B21ProgramMember" abstract="true" name="B21ProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_StandbyUnusedLettersOfCreditandbankguarantees" abstract="false" name="StandbyUnusedLettersOfCreditandbankguarantees" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_SuretyBondOutstanding" abstract="false" name="SuretyBondOutstanding" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_A2022FiveYearTermDomain" abstract="true" name="A2022FiveYearTermDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_CashUnitsAndCashPerformanceUnitsMember" abstract="true" name="CashUnitsAndCashPerformanceUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_CashPerformanceUnitsMember" abstract="true" name="CashPerformanceUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_RestrictedStockRightsandRestrictedPerformanceStockRightsGrantDateAggregateFairValue" abstract="false" name="RestrictedStockRightsandRestrictedPerformanceStockRightsGrantDateAggregateFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_MissionSystemsMember" abstract="true" name="MissionSystemsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_IntersegmentCostsMember" abstract="true" name="IntersegmentCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_FASCASOperatingAdjustment" abstract="false" name="FASCASOperatingAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_UnallowableStateTaxesAndTransactionsCostsFromDivestiture" abstract="false" name="UnallowableStateTaxesAndTransactionsCostsFromDivestiture" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="noc_USGovernmentMember" abstract="true" name="USGovernmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_OtherCustomersMember" abstract="true" name="OtherCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_IntersegmentSalesMember" abstract="true" name="IntersegmentSalesMember" 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:element id="noc_CostReimbursableMember" abstract="true" name="CostReimbursableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="noc_AllOtherGeographicRegionDomain" abstract="true" name="AllOtherGeographicRegionDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
