<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/nport" xmlns:com="http://www.sec.gov/edgar/common" xmlns:ncom="http://www.sec.gov/edgar/nportcommon" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sec.gov/edgar/nport eis_NPORT_Filer.xsd">
  <headerData>
    <submissionType>NPORT-P</submissionType>
    <isConfidential>false</isConfidential>
    <filerInfo>

      <filer>
        <issuerCredentials>
          <cik>0000778207</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>


      <seriesClassInfo>
        <seriesId>S000049122</seriesId>
        <classId>C000154895</classId>
      </seriesClassInfo>


    </filerInfo>
  </headerData>
  <formData>
    <genInfo>
      <regName>TRANSAMERICA SERIES TRUST</regName>
      <regFileNumber>811-04419</regFileNumber>
      <regCik>0000778207</regCik>
      <regLei>5493000QR1WGXIM5V222</regLei>
      <regStreet1>1801 CALIFORNIA STREET</regStreet1>
      <regStreet2>SUITE 5200</regStreet2>
      <regCity>DENVER</regCity>
      <regStateConditional regCountry="US" regState="US-CO"/>
      <regZipOrPostalCode>80202</regZipOrPostalCode>
      <regPhone>720-493-4256</regPhone>
      <seriesName>Transamerica American Funds Managed Risk VP</seriesName>
      <seriesId>S000049122</seriesId>
      <seriesLei>549300LDEG5SXI810D95</seriesLei>
      <repPdEnd>2021-12-31</repPdEnd>
      <repPdDate>2021-12-31</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>1107850806.03</totAssets>
      <totLiabs>1155747.19</totLiabs>
      <netAssets>1106695058.84</netAssets>
      <assetsAttrMiscSec>0.00000000</assetsAttrMiscSec>
      <assetsInvested>0.00000000</assetsInvested>
      <amtPayOneYrBanksBorr>0.00000000</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0.00000000</amtPayOneYrCtrldComp>
      <amtPayOneYrOthAffil>0.00000000</amtPayOneYrOthAffil>
      <amtPayOneYrOther>0.00000000</amtPayOneYrOther>
      <amtPayAftOneYrBanksBorr>0.00000000</amtPayAftOneYrBanksBorr>
      <amtPayAftOneYrCtrldComp>0.00000000</amtPayAftOneYrCtrldComp>
      <amtPayAftOneYrOthAffil>0.00000000</amtPayAftOneYrOthAffil>
      <amtPayAftOneYrOther>0.00000000</amtPayAftOneYrOther>
      <delayDeliv>0.00000000</delayDeliv>
      <standByCommit>0.00000000</standByCommit>
      <liquidPref>0.00000000</liquidPref>
      <cshNotRptdInCorD>0.00000000</cshNotRptdInCorD>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
          <monthlyTotReturn classId="C000154895" rtn1="4.11000000" rtn2="-1.90000000" rtn3="3.33000000"/>
        </monthlyTotReturns>
        <monthlyReturnCats>
          <equityContracts>
            <mon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            <mon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            <mon3 netRealizedGain="-637732.64000000" netUnrealizedAppr="0.00000000"/>
            <futureCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="-637732.64000000" netUnrealizedAppr="0.00000000"/>
            </futureCategory>
          </equityContracts>
          <foreignExchgContracts>
            <mon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            <mon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            <mon3 netRealizedGain="327.30000000" netUnrealizedAppr="0.00000000"/>
            <futureCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="327.30000000" netUnrealizedAppr="0.00000000"/>
            </futureCategory>
          </foreignExchgContracts>
        </monthlyReturnCats>
        <othMon1 netRealizedGain="0.00000000" netUnrealizedAppr="43829251.89000000"/>
        <othMon2 netRealizedGain="0.00000000" netUnrealizedAppr="-19686019.92000000"/>
        <othMon3 netRealizedGain="2927283.75000000" netUnrealizedAppr="19314334.51000000"/>
      </returnInfo>
      <mon1Flow redemption="5405379.49000000" reinvestment="0.00000000" sales="3323290.78000000"/>
      <mon2Flow redemption="8547660.11000000" reinvestment="0.00000000" sales="2040672.79000000"/>
      <mon3Flow redemption="8332129.30000000" reinvestment="0.00000000" sales="13386.28000000"/>


    </fundInfo>
    <invstOrSecs>
      <invstOrSec>
        <name>American Funds Insurance Series - Asset Allocation Fund</name>
        <lei>NZ0CKTWRMGPUOK1M2496</lei>
        <title>American Funds Insurance Series - Asset Allocation Fund</title>
        <cusip>030372601</cusip>
        <identifiers>
          <isin value="US0303726014"/>
        </identifiers>
        <balance>37251535.75200000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1083274659.67000000</valUSD>
        <pctVal>97.88375316371</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Fixed Income Clearing Corp</name>
        <lei>549300H47WTHXPU08X20</lei>
        <title>FIXED INC CLEARING CORP.REPO</title>
        <cusip>000000000</cusip>
        <identifiers>
          <other otherDesc="Internal Identifier" value="85748R009"/>
        </identifiers>
        <balance>24576206.36000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>24576206.36000000</valUSD>
        <pctVal>2.220684565607</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>RA</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <repurchaseAgrmt>
          <transCat>Repurchase</transCat>
          <clearedCentCparty centralCounterparty="Fixed Income Clearing Corp" isCleared="Y"/>
          <isTriParty>N</isTriParty>
          <repurchaseRt>0.00000000</repurchaseRt>
          <maturityDt>2022-01-03</maturityDt>
          <repurchaseCollaterals>
            <repurchaseCollateral>
              <principalAmt>25170000.00000000</principalAmt>
              <principalCd>USD</principalCd>
              <collateralVal>25067759.46000000</collateralVal>
              <collateralCd>USD</collateralCd>
              <invstCat>UST</invstCat>
            </repurchaseCollateral>
          </repurchaseCollaterals>
        </repurchaseAgrmt>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <explntrNotes>
      <explntrNote note="Monthly returns presented in Item B.5(a) have been calculated without deducting any applicable sales loads or redemption fees." noteItem="B.5.a"/>
      <explntrNote note="Monthly returns presented in Item B.5(a) have been calculated without deducting any applicable sales loads or redemption fees." noteItem="B.5.a"/>
    </explntrNotes>
    <signature>
      <ncom:dateSigned>2022-01-25</ncom:dateSigned>
      <ncom:nameOfApplicant>TRANSAMERICA SERIES TRUST</ncom:nameOfApplicant>
      <ncom:signature>Vincent Toner</ncom:signature>
      <ncom:signerName>Vincent Toner</ncom:signerName>
      <ncom:title>Treasurer</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
