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    <isConfidential>false</isConfidential>
    <filerInfo>

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


      <seriesClassInfo>
        <seriesId>S000053167</seriesId>
        <classId>C000167274</classId>
      </seriesClassInfo>


    </filerInfo>
  </headerData>
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    <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 BlackRock iShares Edge 100 VP</seriesName>
      <seriesId>S000053167</seriesId>
      <seriesLei>5493001TEO1QZIKFBV97</seriesLei>
      <repPdEnd>2021-12-31</repPdEnd>
      <repPdDate>2021-12-31</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>121552700.02</totAssets>
      <totLiabs>16240871.61</totLiabs>
      <netAssets>105311828.41</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>168475.57000000</cshNotRptdInCorD>
      <borrowers>
        <borrower aggrVal="6348879.00000000" lei="ZBUT11V806EZRVTWT807" name="J.P. Morgan Securities LLC"/>
        <borrower aggrVal="54795.00000000" lei="BFM8T61CT2L1QCEMIK50" name="UBS AG"/>
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        <borrower aggrVal="207279.00000000" lei="12UUJYTN7D3SW8KCSG25" name="Citadel Securities LLC"/>
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      <aggregateCondition isNonCashCollateral="Y">
        <aggregateInfos>
          <aggregateInfo amt="55698.40000000" collatrl="58639.50000000">
            <invstCat>UST</invstCat>
          </aggregateInfo>
        </aggregateInfos>
      </aggregateCondition>
      <returnInfo>
        <monthlyTotReturns>
          <monthlyTotReturn classId="C000167274" rtn1="4.92000000" rtn2="-2.11000000" rtn3="4.07000000"/>
        </monthlyTotReturns>
        <othMon1 netRealizedGain="437853.54000000" netUnrealizedAppr="4409497.52000000"/>
        <othMon2 netRealizedGain="95611.11000000" netUnrealizedAppr="-2243395.27000000"/>
        <othMon3 netRealizedGain="0.00000000" netUnrealizedAppr="3664008.14000000"/>
      </returnInfo>
      <mon1Flow redemption="769543.02000000" reinvestment="0.00000000" sales="576335.73000000"/>
      <mon2Flow redemption="241006.18000000" reinvestment="0.00000000" sales="766755.02000000"/>
      <mon3Flow redemption="441266.51000000" reinvestment="0.00000000" sales="710463.24000000"/>


    </fundInfo>
    <invstOrSecs>
      <invstOrSec>
        <name>iShares MSCI Emerging Markets Min Vol Factor ETF</name>
        <lei>XWXMX00WTU4PW8BLTO28</lei>
        <title>iShares MSCI Emerging Markets Min Vol Factor ETF</title>
        <cusip>464286533</cusip>
        <identifiers>
          <isin value="US4642865335"/>
        </identifiers>
        <balance>83907.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>5271037.74000000</valUSD>
        <pctVal>5.005171612327</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>
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          <isin value="US8574927062"/>
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        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>8052575.00000000</valUSD>
        <pctVal>7.646410779850</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>STIV</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <cashCollateralCondition cashCollateralVal="8052575.00000000" isCashCollateral="Y"/>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>iShares MSCI USA Min Vol Factor ETF</name>
        <lei>54930006KUZN6GLGL496</lei>
        <title>iShares MSCI USA Min Vol Factor ETF</title>
        <cusip>46429B697</cusip>
        <identifiers>
          <isin value="US46429B6974"/>
        </identifiers>
        <balance>216782.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>17537663.80000000</valUSD>
        <pctVal>16.65308072681</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>iShares MSCI USA Value Factor ETF</name>
        <lei>549300QCMVXVCAPD3O82</lei>
        <title>iShares MSCI USA Value Factor ETF</title>
        <cusip>46432F388</cusip>
        <identifiers>
          <isin value="US46432F3881"/>
        </identifiers>
        <balance>156571.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>17139827.37000000</valUSD>
        <pctVal>16.27531078775</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="54795.00000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>iShares MSCI EAFE Min Vol Factor ETF</name>
        <lei>549300N5K4JSWEZ74544</lei>
        <title>iShares MSCI EAFE Min Vol Factor ETF</title>
        <cusip>46429B689</cusip>
        <identifiers>
          <isin value="US46429B6891"/>
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        <balance>252850.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>19411294.50000000</valUSD>
        <pctVal>18.43220727725</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="7607907.00000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>iShares MSCI USA Quality Factor ETF</name>
        <lei>5493007KMK0CQLE2O168</lei>
        <title>iShares MSCI USA Quality Factor ETF</title>
        <cusip>46432F339</cusip>
        <identifiers>
          <isin value="US46432F3394"/>
        </identifiers>
        <balance>124001.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>18049585.56000000</valUSD>
        <pctVal>17.13918164038</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>iShares MSCI USA Momentum Factor ETF</name>
        <lei>5493002ZOOZ0SN3YYI81</lei>
        <title>iShares MSCI USA Momentum Factor ETF</title>
        <cusip>46432F396</cusip>
        <identifiers>
          <isin value="US46432F3964"/>
        </identifiers>
        <balance>91879.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>16705439.78000000</valUSD>
        <pctVal>15.86283329443</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="290912.00000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>iShares MSCI USA Size Factor ETF</name>
        <lei>5493007FX38U4LSCPO86</lei>
        <title>iShares MSCI USA Size Factor ETF</title>
        <cusip>46432F370</cusip>
        <identifiers>
          <isin value="US46432F3709"/>
        </identifiers>
        <balance>80825.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>11094039.50000000</valUSD>
        <pctVal>10.53446670473</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"/>
      <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>
