<?xml version="1.0" encoding="us-ascii"?>
<!--XBRL document created with Toppan Merrill Bridge  10.1.0.3 -->
<!--Based on XBRL 2.1-->
<!--Created on: 10/28/2022 4:27:23 PM-->
<!--Modified on: 10/28/2022 4:27:23 PM-->
<xsd:schema targetNamespace="http://www.marineproductscorp.com/20220930" elementFormDefault="qualified" xmlns:us-gaap="http://fasb.org/us-gaap/2022" xmlns:srt-types="http://fasb.org/srt-types/2022" xmlns:ref="http://www.xbrl.org/2006/ref" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:currency="http://xbrl.sec.gov/currency/2022" xmlns:exch="http://xbrl.sec.gov/exch/2022" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:naics="http://xbrl.sec.gov/naics/2022" xmlns:country="http://xbrl.sec.gov/country/2022" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:srt="http://fasb.org/srt/2022" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:sic="http://xbrl.sec.gov/sic/2022" xmlns:us-types="http://fasb.org/us-types/2022" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:stpr="http://xbrl.sec.gov/stpr/2022" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:mpx="http://www.marineproductscorp.com/20220930" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2020-01-21" xmlns:us-roles="http://fasb.org/us-roles/2022" xmlns:srt-roles="http://fasb.org/srt-roles/2022" xmlns:utr="http://www.xbrl.org/2009/utr" xmlns:attributeFormDefault="unqualified" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:deprecated="http://www.xbrl.org/2009/role/deprecated" xmlns:net="http://www.xbrl.org/2009/role/net" xmlns:dei="http://xbrl.sec.gov/dei/2022" xmlns:dtr="http://www.xbrl.org/2009/dtr" xmlns:cef="http://xbrl.sec.gov/cef/2022" xmlns:xbrldi="http://xbrl.org/2006/xbrldi">
  <xsd:annotation>
    <xsd:appinfo>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosureStandardAndCustomAxisDomainDefaults" id="DisclosureStandardAndCustomAxisDomainDefaults">
        <link:definition>99900 - Disclosure - Standard And Custom Axis Domain Defaults</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/StatementConsolidatedBalanceSheets" id="StatementConsolidatedBalanceSheets">
        <link:definition>00100 - Statement - CONSOLIDATED BALANCE SHEETS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/StatementConsolidatedStatementsOfOperations" id="StatementConsolidatedStatementsOfOperations">
        <link:definition>00200 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/StatementConsolidatedStatementsOfComprehensiveIncome" id="StatementConsolidatedStatementsOfComprehensiveIncome">
        <link:definition>00300 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/StatementConsolidatedStatementsOfCashFlows" id="StatementConsolidatedStatementsOfCashFlows">
        <link:definition>00500 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosureEarningsPerShareDetails" id="DisclosureEarningsPerShareDetails">
        <link:definition>40401 - Disclosure - EARNINGS PER SHARE (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 roleURI="http://www.marineproductscorp.com/role/DisclosureInventoriesDetails" id="DisclosureInventoriesDetails">
        <link:definition>40801 - Disclosure - INVENTORIES (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 roleURI="http://www.marineproductscorp.com/role/DisclosurePensionAndRetirementPlansLiabilitiesComponentsOfNetPeriodicCostBenefitDetails" id="DisclosurePensionAndRetirementPlansLiabilitiesComponentsOfNetPeriodicCostBenefitDetails">
        <link:definition>41001 - Disclosure - PENSION AND RETIREMENT PLANS LIABILITIES - Components of net periodic cost (benefit) (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 roleURI="http://www.marineproductscorp.com/role/DisclosureAccruedExpensesAndOtherLiabilitiesDetails" id="DisclosureAccruedExpensesAndOtherLiabilitiesDetails">
        <link:definition>41301 - Disclosure - ACCRUED EXPENSES AND OTHER LIABILITIES (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 roleURI="http://www.marineproductscorp.com/role/StatementConsolidatedStatementsOfStockholdersEquity" id="StatementConsolidatedStatementsOfStockholdersEquity">
        <link:definition>00400 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosureGeneralDetails" id="DisclosureGeneralDetails">
        <link:definition>40101 - Disclosure - GENERAL (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 roleURI="http://www.marineproductscorp.com/role/DisclosureNetSalesPaymentTermsDetails" id="DisclosureNetSalesPaymentTermsDetails">
        <link:definition>40301 - Disclosure - NET SALES - Payment Terms (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 roleURI="http://www.marineproductscorp.com/role/DisclosureNetSalesDisaggregateSalesByMajorSourceDetails" id="DisclosureNetSalesDisaggregateSalesByMajorSourceDetails">
        <link:definition>40302 - Disclosure - NET SALES - Disaggregate sales by major source (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 roleURI="http://www.marineproductscorp.com/role/DisclosureNetSalesDisaggregateRevenueByLocationDetails" id="DisclosureNetSalesDisaggregateRevenueByLocationDetails">
        <link:definition>40303 - Disclosure - NET SALES - Disaggregate revenue by location (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 roleURI="http://www.marineproductscorp.com/role/DisclosureNetSalesDeferredRevenueDetails" id="DisclosureNetSalesDeferredRevenueDetails">
        <link:definition>40304 - Disclosure - NET SALES - Deferred revenue (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 roleURI="http://www.marineproductscorp.com/role/DisclosureStockBasedCompensationDetails" id="DisclosureStockBasedCompensationDetails">
        <link:definition>40501 - Disclosure - STOCK-BASED COMPENSATION (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 roleURI="http://www.marineproductscorp.com/role/DisclosureStockBasedCompensationNonVestedRsuSDetails" id="DisclosureStockBasedCompensationNonVestedRsuSDetails">
        <link:definition>40503 - Disclosure - STOCK-BASED COMPENSATION - Non vested RSU's (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 roleURI="http://www.marineproductscorp.com/role/DisclosureStockBasedCompensationFairValueDetails" id="DisclosureStockBasedCompensationFairValueDetails">
        <link:definition>40504 - Disclosure - STOCK-BASED COMPENSATION - Fair value (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 roleURI="http://www.marineproductscorp.com/role/DisclosureStockBasedCompensationOtherInformationDetails" id="DisclosureStockBasedCompensationOtherInformationDetails">
        <link:definition>40505 - Disclosure - STOCK-BASED COMPENSATION - Other Information (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 roleURI="http://www.marineproductscorp.com/role/DisclosureWarrantyCostsAndOtherContingenciesWarrantyCostsDetails" id="DisclosureWarrantyCostsAndOtherContingenciesWarrantyCostsDetails">
        <link:definition>40601 - Disclosure - WARRANTY COSTS AND OTHER CONTINGENCIES - Warranty Costs (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 roleURI="http://www.marineproductscorp.com/role/DisclosureWarrantyCostsAndOtherContingenciesRepurchaseObligationsDetails" id="DisclosureWarrantyCostsAndOtherContingenciesRepurchaseObligationsDetails">
        <link:definition>40603 - Disclosure - WARRANTY COSTS AND OTHER CONTINGENCIES- Repurchase Obligations (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 roleURI="http://www.marineproductscorp.com/role/DisclosurePensionAndRetirementPlansLiabilitiesDetails" id="DisclosurePensionAndRetirementPlansLiabilitiesDetails">
        <link:definition>41002 - Disclosure - PENSION AND RETIREMENT PLANS LIABILITIES (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 roleURI="http://www.marineproductscorp.com/role/DisclosureAccumulatedOtherComprehensiveLossDetails" id="DisclosureAccumulatedOtherComprehensiveLossDetails">
        <link:definition>41201 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS (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 roleURI="http://www.marineproductscorp.com/role/DisclosureNotesPayableToBanksDetails" id="DisclosureNotesPayableToBanksDetails">
        <link:definition>41401 - Disclosure - NOTES PAYABLE TO BANKS (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 roleURI="http://www.marineproductscorp.com/role/DisclosureSubsequentEventDetails" id="DisclosureSubsequentEventDetails">
        <link:definition>41501 - Disclosure - SUBSEQUENT EVENT (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 roleURI="http://www.marineproductscorp.com/role/DocumentDocumentAndEntityInformation" id="DocumentDocumentAndEntityInformation">
        <link:definition>00090 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/StatementConsolidatedBalanceSheetsParenthetical" id="StatementConsolidatedBalanceSheetsParenthetical">
        <link:definition>00105 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosureGeneral" id="DisclosureGeneral">
        <link:definition>10101 - Disclosure - GENERAL</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosureRecentAccountingStandards" id="DisclosureRecentAccountingStandards">
        <link:definition>10201 - Disclosure - RECENT ACCOUNTING STANDARDS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosureNetSales" id="DisclosureNetSales">
        <link:definition>10301 - Disclosure - NET SALES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosureEarningsPerShare" id="DisclosureEarningsPerShare">
        <link:definition>10401 - Disclosure - EARNINGS PER SHARE</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosureStockBasedCompensation" id="DisclosureStockBasedCompensation">
        <link:definition>10501 - Disclosure - STOCK-BASED COMPENSATION</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosureWarrantyCostsAndOtherContingencies" id="DisclosureWarrantyCostsAndOtherContingencies">
        <link:definition>10601 - Disclosure - WARRANTY COSTS AND OTHER CONTINGENCIES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosureBusinessSegmentInformation" id="DisclosureBusinessSegmentInformation">
        <link:definition>10701 - Disclosure - BUSINESS SEGMENT INFORMATION</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosureInventories" id="DisclosureInventories">
        <link:definition>10801 - Disclosure - INVENTORIES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosureIncomeTaxes" id="DisclosureIncomeTaxes">
        <link:definition>10901 - Disclosure - INCOME TAXES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosurePensionAndRetirementPlansLiabilities" id="DisclosurePensionAndRetirementPlansLiabilities">
        <link:definition>11001 - Disclosure - PENSION AND RETIREMENT PLANS LIABILITIES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosureFairValueMeasurements" id="DisclosureFairValueMeasurements">
        <link:definition>11101 - Disclosure - FAIR VALUE MEASUREMENTS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosureAccumulatedOtherComprehensiveLoss" id="DisclosureAccumulatedOtherComprehensiveLoss">
        <link:definition>11201 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosureAccruedExpensesAndOtherLiabilities" id="DisclosureAccruedExpensesAndOtherLiabilities">
        <link:definition>11301 - Disclosure - ACCRUED EXPENSES AND OTHER LIABILITIES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosureNotesPayableToBanks" id="DisclosureNotesPayableToBanks">
        <link:definition>11401 - Disclosure - NOTES PAYABLE TO BANKS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.marineproductscorp.com/role/DisclosureSubsequentEvent" id="DisclosureSubsequentEvent">
        <link:definition>11501 - Disclosure - 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 roleURI="http://www.marineproductscorp.com/role/DisclosureRecentAccountingStandardsPolicies" id="DisclosureRecentAccountingStandardsPolicies">
        <link:definition>20202 - Disclosure - RECENT ACCOUNTING STANDARDS (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 roleURI="http://www.marineproductscorp.com/role/DisclosureNetSalesTables" id="DisclosureNetSalesTables">
        <link:definition>30303 - Disclosure - NET SALES (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 roleURI="http://www.marineproductscorp.com/role/DisclosureEarningsPerShareTables" id="DisclosureEarningsPerShareTables">
        <link:definition>30403 - Disclosure - EARNINGS PER SHARE (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 roleURI="http://www.marineproductscorp.com/role/DisclosureStockBasedCompensationTables" id="DisclosureStockBasedCompensationTables">
        <link:definition>30503 - Disclosure - STOCK-BASED COMPENSATION (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 roleURI="http://www.marineproductscorp.com/role/DisclosureWarrantyCostsAndOtherContingenciesTables" id="DisclosureWarrantyCostsAndOtherContingenciesTables">
        <link:definition>30603 - Disclosure - WARRANTY COSTS AND OTHER CONTINGENCIES (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 roleURI="http://www.marineproductscorp.com/role/DisclosureInventoriesTables" id="DisclosureInventoriesTables">
        <link:definition>30803 - Disclosure - INVENTORIES (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 roleURI="http://www.marineproductscorp.com/role/DisclosurePensionAndRetirementPlansLiabilitiesTables" id="DisclosurePensionAndRetirementPlansLiabilitiesTables">
        <link:definition>31003 - Disclosure - PENSION AND RETIREMENT PLANS LIABILITIES (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 roleURI="http://www.marineproductscorp.com/role/DisclosureAccumulatedOtherComprehensiveLossTables" id="DisclosureAccumulatedOtherComprehensiveLossTables">
        <link:definition>31203 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS (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 roleURI="http://www.marineproductscorp.com/role/DisclosureAccruedExpensesAndOtherLiabilitiesTables" id="DisclosureAccruedExpensesAndOtherLiabilitiesTables">
        <link:definition>31303 - Disclosure - ACCRUED EXPENSES AND OTHER LIABILITIES (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 roleURI="http://www.marineproductscorp.com/role/DisclosureStockBasedCompensationCompensationExpenseDetails" id="DisclosureStockBasedCompensationCompensationExpenseDetails">
        <link:definition>40502 - Disclosure - STOCK-BASED COMPENSATION - Compensation expense (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 roleURI="http://www.marineproductscorp.com/role/DisclosureWarrantyCostsAndOtherContingenciesAnalysisOfWarrantyAccrualsDetails" id="DisclosureWarrantyCostsAndOtherContingenciesAnalysisOfWarrantyAccrualsDetails">
        <link:definition>40602 - Disclosure - WARRANTY COSTS AND OTHER CONTINGENCIES - Analysis of warranty accruals (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 roleURI="http://www.marineproductscorp.com/role/DisclosureBusinessSegmentInformationDetails" id="DisclosureBusinessSegmentInformationDetails">
        <link:definition>40701 - Disclosure - BUSINESS SEGMENT INFORMATION (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 roleURI="http://www.marineproductscorp.com/role/DisclosureIncomeTaxesDetails" id="DisclosureIncomeTaxesDetails">
        <link:definition>40901 - Disclosure - INCOME TAXES (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbaseRef xlink:type="simple" xlink:href="mpx-20220930_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="mpx-20220930_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="mpx-20220930_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="mpx-20220930_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:import namespace="http://xbrl.sec.gov/dei/2022" schemaLocation="https://xbrl.sec.gov/dei/2022/dei-2022.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd" />
  <xsd:import namespace="http://fasb.org/us-roles/2022" schemaLocation="https://xbrl.fasb.org/us-gaap/2022/elts/us-roles-2022.xsd" />
  <xsd:import namespace="http://fasb.org/us-gaap/2022" schemaLocation="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd" />
  <xsd:import namespace="http://fasb.org/srt/2022" schemaLocation="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/country/2022" schemaLocation="https://xbrl.sec.gov/country/2022/country-2022.xsd" />
  <xsd:element id="mpx_AccruedExpensesAndOtherCurrentLiabilities" name="AccruedExpensesAndOtherCurrentLiabilities" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element name="WeightedAverageNumberOfSharesIncludingParticipatingSecuritiesOutstandingDiluted" id="mpx_WeightedAverageNumberOfSharesIncludingParticipatingSecuritiesOutstandingDiluted" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AccruedSalesIncentivesAndDiscountsCurrent" id="mpx_AccruedSalesIncentivesAndDiscountsCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="AccumulatedOtherComprehensiveIncomeLossReclassificationAdjustmentNetOfTaxesAbstract" id="mpx_AccumulatedOtherComprehensiveIncomeLossReclassificationAdjustmentNetOfTaxesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AccumulatedOtherComprehensiveIncomeLossAmortizationOfNetLossGain" id="mpx_AccumulatedOtherComprehensiveIncomeLossAmortizationOfNetLossGain" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="mpx_DefinedBenefitPlanTradingGainsLosses" name="DefinedBenefitPlanTradingGainsLosses" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="mpx_GeneralAbstract" name="GeneralAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mpx_WarrantCostAndOtherContingenciesTable" name="WarrantCostAndOtherContingenciesTable" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mpx_ChaparralProductsMember" name="ChaparralProductsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mpx_WarrantCostAndOtherContingenciesLineItems" name="WarrantCostAndOtherContingenciesLineItems" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mpx_TermOfTransferableWarrantyForStructuralDeckWarranty" name="TermOfTransferableWarrantyForStructuralDeckWarranty" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="mpx_TermOfTransferableWarrantyForStructuralHull" name="TermOfTransferableWarrantyForStructuralHull" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="mpx_TermOfTransferableHullWarrantyTerminatesAfterDateOfOriginalRetailPurchase" name="TermOfTransferableHullWarrantyTerminatesAfterDateOfOriginalRetailPurchase" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="mpx_RevenueRemainingPerformanceObligationSatisfactionPeriod" name="RevenueRemainingPerformanceObligationSatisfactionPeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="mpx_LimitedWarrantyTerm" name="LimitedWarrantyTerm" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="mpx_WarrantyForAdditionalItemsTerm" name="WarrantyForAdditionalItemsTerm" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="mpx_SubsequentOwnerMember" name="SubsequentOwnerMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mpx_FloorPlanLenderOneMember" name="FloorPlanLenderOneMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mpx_AdditionalFloorPlanLendersMember" name="AdditionalFloorPlanLendersMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mpx_BoatsAndAccessoriesMember" name="BoatsAndAccessoriesMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mpx_PartsMember" name="PartsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mpx_ChangeInFairValueOfLiabilityUnrealizedGains" name="ChangeInFairValueOfLiabilityUnrealizedGains" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="mpx_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesDeferralsNetOfDistributionStatedAtFairValue" name="PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesDeferralsNetOfDistributionStatedAtFairValue" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element name="SwinglineLoanMember" id="mpx_SwinglineLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LineOfCreditFacilityCommittedAccordionIncreaseInAggregateCommitmentsAmount" id="mpx_LineOfCreditFacilityCommittedAccordionIncreaseInAggregateCommitmentsAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="MaximumDebtConsolidatedLeverageRatio" id="mpx_MaximumDebtConsolidatedLeverageRatio" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="MinimumDebtConsolidatedFixedChargedCoverageRatio" id="mpx_MinimumDebtConsolidatedFixedChargedCoverageRatio" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AssetDefinedBenefitPensionPlanCurrent" id="mpx_AssetDefinedBenefitPensionPlanCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
</xsd:schema>
