<?xml version="1.0" encoding="UTF-8"?>
<edgarSubmission xmlns="http://www.sec.gov/edgar/ncen" xmlns:ns1="http://www.sec.gov/edgar/common" xmlns:sccom="http://www.sec.gov/edgar/sccommon" xmlns:ncom="http://www.sec.gov/edgar/ncencommon" xmlns:iso="http://www.sec.gov/edgar/iso_statecodes" xmlns:exch="http://www.sec.gov/edgar/iso_exchangelist" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <schemaVersion>X0404</schemaVersion>
  <headerData>
    <submissionType>N-CEN</submissionType>
    <filerInfo>
      <liveTestFlag>LIVE</liveTestFlag>
      <filer>
        <issuerCredentials>
          <cik>0000705189</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>
      <investmentCompanyType>N-6</investmentCompanyType>
    </filerInfo>
    <seriesClass>
      <reportClass>
        <classInfo>
          <classId>C000030140</classId>
          <!--Field: Pseudo-Tag; ID: Class Name; Data: Variable Life Select-->
        </classInfo>
        <classInfo>
          <classId>C000030141</classId>
          <!--Field: Pseudo-Tag; ID: Class Name; Data: Variable Life Plus-->
        </classInfo>
        <classInfo>
          <classId>C000030142</classId>
          <!--Field: Pseudo-Tag; ID: Class Name; Data: Variable Life-->
        </classInfo>
      </reportClass>
    </seriesClass>
  </headerData>
  <formData>
    <generalInfo reportEndingPeriod="2023-12-31" isReportPeriodLt12="N"/>
    <registrantInfo>
      <registrantFullName>MML BAY STATE VARIABLE LIFE SEPARATE ACCOUNT I</registrantFullName>
      <investmentCompFileNo>811-03542</investmentCompFileNo>
      <registrantCik>0000705189</registrantCik>
      <registrantLei>5493000MV3JP27B6F137</registrantLei>
      <registrantstreet1>100 Bright Meadow Blvd</registrantstreet1>
      <registrantcity>Enfield</registrantcity>
      <registrantzipCode>06082</registrantzipCode>
      <registrantstate>US-CT</registrantstate>
      <registrantcountry>US</registrantcountry>
      <registrantphoneNumber>860-562-1000</registrantphoneNumber>
      <websites>
        <website webpage="massmutual.com"/>
      </websites>
      <locationBooksRecords>
        <locationBooksRecord>
          <officeName>Yin Wang</officeName>
          <officeAddress1>1295 State Street</officeAddress1>
          <officeCity>Springfield</officeCity>
          <officeStateCountry officeState="US-MA" officeCountry="US"/>
          <officeRecordsZipCode>01111</officeRecordsZipCode>
          <officePhone>413-788-8411</officePhone>
          <booksRecordsDesc>General ledger, accounting records, confirmations and customer records.</booksRecordsDesc>
        </locationBooksRecord>
      </locationBooksRecords>
      <isRegistrantFirstFiling>N</isRegistrantFirstFiling>
      <isRegistrantLastFiling>N</isRegistrantLastFiling>
      <registrantFamilyInvComp isRegistrantFamilyInvComp="Y" familyInvCompFullName="MassMutual Family of VA/VL Registered Separate Accounts"/>
      <registrantClassificationType>N-6</registrantClassificationType>
      <isSecuritiesActRegistration>Y</isSecuritiesActRegistration>
      <chiefComplianceOfficers>
        <chiefComplianceOfficer>
          <ccoName>James Puhala</ccoName>
          <crdNumber>N/A</crdNumber>
          <ccoStreet1>1295 State Street</ccoStreet1>
          <ccoCity>Springfield</ccoCity>
          <ccoStateCountry ccoState="US-MA" ccoCountry="US"/>
          <ccoZipCode>01111</ccoZipCode>
          <ccoPhone>XXXXXX</ccoPhone>
          <isCcoChangedSinceLastFiling>N</isCcoChangedSinceLastFiling>
          <ccoEmployers>
            <ccoEmployer ccoEmployerName="N/A" ccoEmployerId="N/A"/>
          </ccoEmployers>
        </chiefComplianceOfficer>
      </chiefComplianceOfficers>
      <isRegistrantSubmittedMatter>N</isRegistrantSubmittedMatter>
      <isPreviousLegalProceeding>N</isPreviousLegalProceeding>
      <isPreviousProceedingTerminated>N</isPreviousProceedingTerminated>
      <isFinancialSupportDuringPeriod>N</isFinancialSupportDuringPeriod>
      <isExemptionFromAct>N</isExemptionFromAct>
      <principalUnderwriters>
        <principalUnderwriter>
          <principalUnderwriterName>MML Investors Services, LLC</principalUnderwriterName>
          <principalUnderwriterFileNumber>8-27250</principalUnderwriterFileNumber>
          <principalUnderwriterCrdNumber>000010409</principalUnderwriterCrdNumber>
          <principalUnderwriterLei>00000000000000000000</principalUnderwriterLei>
          <principalUnderWriterStateCountry principalUnderWriterState="US-MA" principalUnderWriterCountry="US"/>
          <isPrincipalUnderwriterAffiliatedWithRegistrant>Y</isPrincipalUnderwriterAffiliatedWithRegistrant>
        </principalUnderwriter>
        <principalUnderwriter>
          <principalUnderwriterName>MML Strategic Distributors, LLC</principalUnderwriterName>
          <principalUnderwriterFileNumber>8-69322</principalUnderwriterFileNumber>
          <principalUnderwriterCrdNumber>000168638</principalUnderwriterCrdNumber>
          <principalUnderwriterLei>00000000000000000000</principalUnderwriterLei>
          <principalUnderWriterStateCountry principalUnderWriterState="US-MA" principalUnderWriterCountry="US"/>
          <isPrincipalUnderwriterAffiliatedWithRegistrant>Y</isPrincipalUnderwriterAffiliatedWithRegistrant>
        </principalUnderwriter>
      </principalUnderwriters>
      <isUnderwriterHiredOrTerminated>N</isUnderwriterHiredOrTerminated>
      <publicAccountants>
        <publicAccountant>
          <publicAccountantName>KPMG LLP</publicAccountantName>
          <pcaobNumber>185</pcaobNumber>
          <publicAccountantLei>5493003PVCIGA21K0K42</publicAccountantLei>
          <publicAccountantStateCountry publicAccountantState="US-MA" publicAccountantCountry="US"/>
        </publicAccountant>
      </publicAccountants>
      <isPublicAccountantChanged>N</isPublicAccountantChanged>
      <isOpinionOffered>N</isOpinionOffered>
      <isMaterialChange>N</isMaterialChange>
      <isAccountingPrincipleChange>N</isAccountingPrincipleChange>
    </registrantInfo>
    <unitInvestmentTrust>
      <depositors>
        <depositor>
          <depositorName>MML Bay State Life Insurance Company</depositorName>
          <depositorCrdNo>N/A</depositorCrdNo>
          <depositorLei>5493005EMQYELJUS5W59</depositorLei>
          <depositorStateCountry depositorState="US-CT" depositorCountry="US"/>
          <depositorUltimateParentname>Massachusetts Mutual Life Insurance Company</depositorUltimateParentname>
        </depositor>
      </depositors>
      <uitAdmins>
        <uitAdmin>
          <uitAdminName>MML Bay State Life Insurance Company</uitAdminName>
          <uitAdminLei>5493005EMQYELJUS5W59</uitAdminLei>
          <uitAdminStateCountry uitAdminState="US-CT" uitAdminCountry="US"/>
          <isUitAdminAffiliated>Y</isUitAdminAffiliated>
          <isUitAdminSubAdmin>N</isUitAdminSubAdmin>
        </uitAdmin>
      </uitAdmins>
      <isUitAdminHiredTerminated>N</isUitAdminHiredTerminated>
      <registrantSeparateInsuranceAccount isRegistrantSeparateInsuranceAccount="Y" separateAccountSeriesId="S000010878"/>
      <numOfContracts>19492</numOfContracts>
      <contractSecurities>
        <contractSecurity separateAccountSecurityName="Variable Life Select" separateAccountContractId="C000030140" separateAccountTotalAsset="567962873.65" numContractsSold="0" grossPremiumReceived="12993756.56" grossPremiumReceivedSection1035="0" numContractsAffected="0" contractValueRedeemed="56530994.00" contractValueRedeemedSection1035="0" numContractsAffectedRedeemed="0"/>
        <contractSecurity separateAccountSecurityName="Variable Life Plus" separateAccountContractId="C000030141" separateAccountTotalAsset="195598399.16" numContractsSold="0" grossPremiumReceived="6258973.08" grossPremiumReceivedSection1035="0" numContractsAffected="0" contractValueRedeemed="18492769.00" contractValueRedeemedSection1035="0" numContractsAffectedRedeemed="0"/>
        <contractSecurity separateAccountSecurityName="Variable Life" separateAccountContractId="C000030142" separateAccountTotalAsset="11911913.42" numContractsSold="0" grossPremiumReceived="0" grossPremiumReceivedSection1035="0" numContractsAffected="0" contractValueRedeemed="723869.00" contractValueRedeemedSection1035="0" numContractsAffectedRedeemed="0"/>
      </contractSecurities>
      <isRule6C7Reliance>N</isRule6C7Reliance>
      <isRule11A2Reliance>N</isRule11A2Reliance>
      <isRule12D1Dash4Reliance>N</isRule12D1Dash4Reliance>
      <isRule12D1GReliance>N</isRule12D1GReliance>
    </unitInvestmentTrust>
    <signature registrantSignedName="MML Bay State Variable Life Separate Account I" signedDate="2024-03-14" signature="/s/ Yasmin Aligan" title="Head of Financial Close and External Reporting"/>
  </formData>
</edgarSubmission>
