<?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>S000026902</seriesId>
        <classId>C000080975</classId>
        <classId>C000080976</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 Managed Risk - Conservative ETF VP</seriesName>
      <seriesId>S000026902</seriesId>
      <seriesLei>549300R5OTDNC8N5OF89</seriesLei>
      <repPdEnd>2020-12-31</repPdEnd>
      <repPdDate>2020-03-31</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>917117015.40</totAssets>
      <totLiabs>236322971.99</totLiabs>
      <netAssets>680794043.41</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>
      <borrowers>
        <borrower aggrVal="123638133.54000000" lei="9R7GPTSO7KV3UQJZQ078" name="Morgan Stanley &amp; Co. LLC"/>
        <borrower aggrVal="748940.92000000" lei="AC28XWWI3WIBK2824319" name="Barclays Capital Inc."/>
        <borrower aggrVal="1061838.54000000" lei="1V8Y6QCX6YMJ2OELII46" name="Credit Suisse Securities (USA) LLC"/>
        <borrower aggrVal="3996720.00000000" lei="BFM8T61CT2L1QCEMIK50" name="UBS AG"/>
        <borrower aggrVal="16762015.11000000" lei="FOR8UP27PHTHYVLBNG30" name="Goldman Sachs &amp; Co. LLC"/>
        <borrower aggrVal="4612.50000000" lei="12UUJYTN7D3SW8KCSG25" name="Citadel Securities LLC"/>
        <borrower aggrVal="12081286.46000000" lei="549300QQRY1JCFQHYS08" name="Janney Montgomery Scott LLC"/>
        <borrower aggrVal="12979447.70000000" lei="549300HN4UKV1E2R3U73" name="BofA Securities, Inc."/>
        <borrower aggrVal="4612.50000000" lei="549300CSX55MXZ47EI78" name="Wedbush Securities Inc."/>
      </borrowers>
      <aggregateCondition isNonCashCollateral="Y">
        <aggregateInfos>
          <aggregateInfo amt="90259518.23000000" collatrl="107221195.87000000">
            <invstCat>UST</invstCat>
          </aggregateInfo>
        </aggregateInfos>
      </aggregateCondition>
      <returnInfo>
        <monthlyTotReturns>
          <monthlyTotReturn classId="C000080975" rtn1="1.19000000" rtn2="-0.86000000" rtn3="-4.81000000"/>
          <monthlyTotReturn classId="C000080976" rtn1="1.12000000" rtn2="-0.87000000" rtn3="-4.78000000"/>
        </monthlyTotReturns>
        <othMon1 netRealizedGain="446870.92000000" netUnrealizedAppr="8492088.00000000"/>
        <othMon2 netRealizedGain="280999.42000000" netUnrealizedAppr="-7989499.33000000"/>
        <othMon3 netRealizedGain="4649057.43000000" netUnrealizedAppr="-41587607.94000000"/>
      </returnInfo>
      <mon1Flow redemption="7008781.19000000" reinvestment="0.00000000" sales="968331.56000000"/>
      <mon2Flow redemption="5709430.09000000" reinvestment="0.00000000" sales="2726202.93000000"/>
      <mon3Flow redemption="25841329.09000000" reinvestment="0.00000000" sales="1221527.18000000"/>


    </fundInfo>
    <invstOrSecs>
      <invstOrSec>
        <name>Schwab US Broad Market ETF</name>
        <lei>549300Z43HSC4Q4CI525</lei>
        <title>Schwab US Broad Market ETF</title>
        <cusip>808524102</cusip>
        <identifiers>
          <isin value="US8085241029"/>
        </identifiers>
        <balance>234005.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>14140922.15000000</valUSD>
        <pctVal>2.077121897126</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>
          <loanByFundCondition isLoanByFund="Y" loanVal="13999694.92000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Deltashares S&amp;P International Managed Risk ETF</name>
        <lei>54930062V5DG83MNM093</lei>
        <title>Deltashares S&amp;P International Managed Risk ETF</title>
        <cusip>89349P404</cusip>
        <identifiers>
          <isin value="US89349P4046"/>
        </identifiers>
        <balance>167067.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>7119560.21000000</valUSD>
        <pctVal>1.045772988015</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>Vanguard Total Bond Market ETF</name>
        <lei>CIJB0QNLPT2SSWMJ5W92</lei>
        <title>Vanguard Total Bond Market ETF</title>
        <cusip>921937835</cusip>
        <identifiers>
          <isin value="US9219378356"/>
        </identifiers>
        <balance>1341573.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>114503255.55000000</valUSD>
        <pctVal>16.81907423520</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>Deltashares S&amp;P 600 Managed Risk ETF</name>
        <lei>549300IZWW3HTKQ0VO20</lei>
        <title>Deltashares S&amp;P 600 Managed Risk ETF</title>
        <cusip>89349P305</cusip>
        <identifiers>
          <isin value="US89349P3055"/>
        </identifiers>
        <balance>29007.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1337947.88000000</valUSD>
        <pctVal>0.196527553810</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>
          <loanByFundCondition isLoanByFund="Y" loanVal="9225.00000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Vanguard FTSE Developed Markets ETF</name>
        <lei>N/A</lei>
        <title>Vanguard FTSE Developed Markets ETF</title>
        <cusip>921943858</cusip>
        <identifiers>
          <isin value="US9219438580"/>
        </identifiers>
        <balance>613589.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>20457057.26000000</valUSD>
        <pctVal>3.004881940143</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>DeltaShares S&amp;P EM 100 &amp; Managed Risk ETF</name>
        <lei>549300CHOYI8JFLKTT86</lei>
        <title>DeltaShares S&amp;P EM 100 &amp; Managed Risk ETF</title>
        <cusip>89349P503</cusip>
        <identifiers>
          <isin value="US89349P5035"/>
        </identifiers>
        <balance>37000.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1664674.40000000</valUSD>
        <pctVal>0.244519530702</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>State Street Global Advisors</name>
        <lei>5493008BJIBKQ5KTIF74</lei>
        <title>State Street Navigator Securities Lending Government Money Market Portfolio</title>
        <cusip>857492706</cusip>
        <identifiers>
          <isin value="US8574927062"/>
        </identifiers>
        <balance>68411461.50000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>68411461.50000000</valUSD>
        <pctVal>10.04877498007</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>STIV</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <cashCollateralCondition cashCollateralVal="68411461.50000000" isCashCollateral="Y"/>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>iShares Core U.S. Aggregate Bond ETF</name>
        <lei>549300F7VSXTKBGHJE47</lei>
        <title>iShares Core U.S. Aggregate Bond ETF</title>
        <cusip>464287226</cusip>
        <identifiers>
          <isin value="US4642872265"/>
        </identifiers>
        <balance>787501.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>90853990.37000000</valUSD>
        <pctVal>13.34529748746</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>Vanguard Total Stock Market ETF</name>
        <lei>HJ2RZRUQEVF2A5SPRB21</lei>
        <title>Vanguard Total Stock Market ETF</title>
        <cusip>922908769</cusip>
        <identifiers>
          <isin value="US9229087690"/>
        </identifiers>
        <balance>236000.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>30422760.00000000</valUSD>
        <pctVal>4.468717124435</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>
          <loanByFundCondition isLoanByFund="Y" loanVal="21267709.02000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>iShares Short Treasury Bond ETF</name>
        <lei>549300F8ZJ4IZLOOBP30</lei>
        <title>iShares Short Treasury Bond ETF</title>
        <cusip>464288679</cusip>
        <identifiers>
          <isin value="US4642886794"/>
        </identifiers>
        <balance>2285446.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>253730214.92000000</valUSD>
        <pctVal>37.26974661075</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>
          <loanByFundCondition isLoanByFund="Y" loanVal="108162456.22000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Deltashares S&amp;P 400 Managed Risk ETF</name>
        <lei>549300DBD7VQ75E2VS70</lei>
        <title>Deltashares S&amp;P 400 Managed Risk ETF</title>
        <cusip>89349P206</cusip>
        <identifiers>
          <isin value="US89349P2065"/>
        </identifiers>
        <balance>84966.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>3910135.32000000</valUSD>
        <pctVal>0.574349226149</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>Vanguard FTSE Emerging Markets ETF</name>
        <lei>I9EY4HOGV0KQ5WF8MP19</lei>
        <title>Vanguard FTSE Emerging Markets ETF</title>
        <cusip>922042858</cusip>
        <identifiers>
          <isin value="US9220428588"/>
        </identifiers>
        <balance>148168.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>4971036.40000000</valUSD>
        <pctVal>0.730182123083</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 INC CLEARING CORP.REPO</name>
        <lei>549300H47WTHXPU08X20</lei>
        <title>FIXED INC CLEARING CORP.REPO</title>
        <cusip>000000000</cusip>
        <identifiers>
          <other otherDesc="Internal Identifier" value="85748R009"/>
        </identifiers>
        <balance>4254661.55000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>4254661.55000000</valUSD>
        <pctVal>0.624955754414</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 INC CLEARING CORP.REPO" isCleared="Y"/>
          <isTriParty>N</isTriParty>
          <repurchaseRt>0.00000000</repurchaseRt>
          <maturityDt>2020-04-01</maturityDt>
          <repurchaseCollaterals>
            <repurchaseCollateral>
              <principalAmt>4160000.00000000</principalAmt>
              <principalCd>USD</principalCd>
              <collateralVal>4339824.32000000</collateralVal>
              <collateralCd>USD</collateralCd>
              <invstCat>UST</invstCat>
            </repurchaseCollateral>
          </repurchaseCollaterals>
        </repurchaseAgrmt>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Schwab U.S. Aggregate Bond ETF</name>
        <lei>549300EMR2FMUC3JFN76</lei>
        <title>Schwab U.S. Aggregate Bond ETF</title>
        <cusip>808524839</cusip>
        <identifiers>
          <isin value="US8085248396"/>
        </identifiers>
        <balance>1805412.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>97979709.24000000</valUSD>
        <pctVal>14.39197510442</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>
          <loanByFundCondition isLoanByFund="Y" loanVal="11076507.00000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>iShares Core S&amp;P Total US Stock Market ETF</name>
        <lei>549300E44NRXZV2OY345</lei>
        <title>iShares Core S&amp;P Total US Stock Market ETF</title>
        <cusip>464287150</cusip>
        <identifiers>
          <isin value="US4642871507"/>
        </identifiers>
        <balance>295951.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>16931356.71000000</valUSD>
        <pctVal>2.487001300010</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>
          <loanByFundCondition isLoanByFund="Y" loanVal="16762015.11000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Deltashares S&amp;P 500 Managed Risk ETF</name>
        <lei>549300H85I26GNONRW53</lei>
        <title>Deltashares S&amp;P 500 Managed Risk ETF</title>
        <cusip>89349P107</cusip>
        <identifiers>
          <isin value="US89349P1075"/>
        </identifiers>
        <balance>344945.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>18882289.30000000</valUSD>
        <pctVal>2.773568523811</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>
    </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"/>
    </explntrNotes>
    <signature>
      <ncom:dateSigned>2020-04-28</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>
  <documents>XXXX</documents>
</edgarSubmission>
