<?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>0000732697</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>


      <seriesClassInfo>
        <seriesId>S000019112</seriesId>
        <classId>C000052855</classId>
      </seriesClassInfo>


    </filerInfo>
  </headerData>
  <formData>
    <genInfo>
      <regName>ULTRA SERIES FUND</regName>
      <regFileNumber>811-04815</regFileNumber>
      <regCik>0000732697</regCik>
      <regLei>254900JPNAJ16VJV5X45</regLei>
      <regStreet1>550 SCIENCE DRIVE</regStreet1>
      <regCity>MADISON</regCity>
      <regStateConditional regCountry="US" regState="US-WI"/>
      <regZipOrPostalCode>53711</regZipOrPostalCode>
      <regPhone>608-274-0300</regPhone>
      <seriesName>Madison Target Retirement 2040 Fund</seriesName>
      <seriesId>S000019112</seriesId>
      <seriesLei>254900IM7322849N6R48</seriesLei>
      <repPdEnd>2024-12-31</repPdEnd>
      <repPdDate>2024-09-30</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>41161132.46</totAssets>
      <totLiabs>9833.37</totLiabs>
      <netAssets>41151299.09</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="C000052855" rtn1="2.30000000" rtn2="1.77000000" rtn3="1.16000000"/>
        </monthlyTotReturns>
        <othMon1 netRealizedGain="2301.83000000" netUnrealizedAppr="852119.18000000"/>
        <othMon2 netRealizedGain="49905.11000000" netUnrealizedAppr="602935.96000000"/>
        <othMon3 netRealizedGain="83047.57000000" netUnrealizedAppr="303554.17000000"/>
      </returnInfo>
      <mon1Flow redemption="302877.13000000" reinvestment="0.00000000" sales="701952.96000000"/>
      <mon2Flow redemption="1925258.20000000" reinvestment="0.00000000" sales="315086.96000000"/>
      <mon3Flow redemption="61014.71000000" reinvestment="0.00000000" sales="834253.77000000"/>


    </fundInfo>
    <invstOrSecs>
      <invstOrSec>
        <name>Invesco Exchange-Traded Fund Trust - Invesco S&amp;P 500 Quality Etf</name>
        <lei>549300CMNB8U49G4GY75</lei>
        <title>Invesco Exchange-Traded Fund Trust - Invesco S&amp;P 500 Quality ETF</title>
        <cusip>46137V241</cusip>
        <identifiers>
          <isin value="US46137V2410"/>
        </identifiers>
        <balance>88265.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>5937586.55000000</valUSD>
        <pctVal>14.42867341080</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 Global Energy ETF</name>
        <lei>5493005XHS63FFTJXT53</lei>
        <title>iShares Global Energy ETF</title>
        <cusip>464287341</cusip>
        <identifiers>
          <isin value="US4642873412"/>
        </identifiers>
        <balance>18382.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>744103.36000000</valUSD>
        <pctVal>1.808213535063</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 Health Care ETF</name>
        <lei>N/A</lei>
        <title>Vanguard Health Care ETF</title>
        <cusip>92204A504</cusip>
        <identifiers>
          <isin value="US92204A5048"/>
        </identifiers>
        <balance>3361.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>948474.20000000</valUSD>
        <pctVal>2.304846313419</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 Intl Quality Factor ETF</name>
        <lei>549300NCBUPWCYENVS18</lei>
        <title>iShares MSCI International Quality Factor ETF</title>
        <cusip>46434V456</cusip>
        <identifiers>
          <isin value="US46434V4564"/>
        </identifiers>
        <balance>58155.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2412850.95000000</valUSD>
        <pctVal>5.863365199535</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>Distillate US Fundamental Stability &amp; Value ETF</name>
        <lei>5493002W0E8K4UD8QD78</lei>
        <title>Distillate U.S. Fundamental Stability &amp; Value ETF</title>
        <cusip>26922A321</cusip>
        <identifiers>
          <isin value="US26922A3216"/>
        </identifiers>
        <balance>103047.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>5845856.31000000</valUSD>
        <pctVal>14.20576370436</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 Aaa - A Rated Corporate Bond ETF</name>
        <lei>5493009W1LC1TK28CL24</lei>
        <title>iShares Aaa - A Rated Corporate Bond ETF</title>
        <cusip>46429B291</cusip>
        <identifiers>
          <isin value="US46429B2916"/>
        </identifiers>
        <balance>23893.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1174340.95000000</valUSD>
        <pctVal>2.853715377081</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 Information Technology ETF</name>
        <lei>J2NTZGJBERBYMUMBIE74</lei>
        <title>Vanguard Information Technology ETF</title>
        <cusip>92204A702</cusip>
        <identifiers>
          <isin value="US92204A7028"/>
        </identifiers>
        <balance>5023.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2946089.96000000</valUSD>
        <pctVal>7.159166357195</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>SPDR Portfolio Short Term Treasury ETF</name>
        <lei>549300CVHDNMTIUMZ693</lei>
        <title>SPDR Portfolio Short Term Treasury ETF</title>
        <cusip>78468R101</cusip>
        <identifiers>
          <isin value="US78468R1014"/>
        </identifiers>
        <balance>89615.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2635577.15000000</valUSD>
        <pctVal>6.404602547870</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>WisdomTree Europe Hedged Equity Fund</name>
        <lei>549300DC1HYUY14EQX39</lei>
        <title>WisdomTree Europe Hedged Equity Fund</title>
        <cusip>97717X701</cusip>
        <identifiers>
          <isin value="US97717X7012"/>
        </identifiers>
        <balance>21986.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>987171.40000000</valUSD>
        <pctVal>2.398882712890</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>549300BZ5TGIFZUZDZ37</lei>
        <title>State Street Institutional US Government Money Market Fund</title>
        <cusip>857492706</cusip>
        <identifiers>
          <isin value="US8574927062"/>
        </identifiers>
        <balance>1679442.28000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1679442.28000000</valUSD>
        <pctVal>4.081140370142</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>STIV</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 7-10 Year Treasury Bond ETF</name>
        <lei>549300XS1PPZG92M8L16</lei>
        <title>iShares 7-10 Year Treasury Bond ETF</title>
        <cusip>464287440</cusip>
        <identifiers>
          <isin value="US4642874402"/>
        </identifiers>
        <balance>40986.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>4021546.32000000</valUSD>
        <pctVal>9.772586549952</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>Distillate Small/Mid Cash Flow ETF</name>
        <lei>549300RXDI4OKGXIK130</lei>
        <title>Distillate Small/Mid Cash Flow ETF</title>
        <cusip>26922B667</cusip>
        <identifiers>
          <isin value="US26922B6671"/>
        </identifiers>
        <balance>15592.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>562247.52000000</valUSD>
        <pctVal>1.366293488743</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 Emerging Markets Asia ETF</name>
        <lei>549300QNROXHZ53JWF91</lei>
        <title>iShares MSCI Emerging Markets Asia ETF</title>
        <cusip>464286426</cusip>
        <identifiers>
          <isin value="US4642864262"/>
        </identifiers>
        <balance>21961.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1720644.35000000</valUSD>
        <pctVal>4.181263746344</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>Schwab Intermediate-Term U.S. Treasury ETF</name>
        <lei>549300LPS1K6133V2Q55</lei>
        <title>Schwab Intermediate-Term U.S. Treasury ETF</title>
        <cusip>808524854</cusip>
        <identifiers>
          <isin value="US8085248545"/>
        </identifiers>
        <balance>73337.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>3710852.20000000</valUSD>
        <pctVal>9.017582147003</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 Treasury Floating Rate Bond ETF</name>
        <lei>549300IH7Y9SW6BCOA50</lei>
        <title>iShares Treasury Floating Rate Bond ETF</title>
        <cusip>46434V860</cusip>
        <identifiers>
          <isin value="US46434V8607"/>
        </identifiers>
        <balance>5902.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>298641.20000000</valUSD>
        <pctVal>0.725715121038</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>JPMorgan BetaBuilders Japan ETF</name>
        <lei>54930031HWFFLQV7A679</lei>
        <title>JPMorgan BetaBuilders Japan ETF</title>
        <cusip>46641Q217</cusip>
        <identifiers>
          <isin value="US46641Q2176"/>
        </identifiers>
        <balance>18486.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1095850.08000000</valUSD>
        <pctVal>2.662978093603</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>Janus Henderson Mortgage-Backed Securities ETF</name>
        <lei>549300V6TVE4ZJCDWY16</lei>
        <title>Janus Henderson Mortgage-Backed Securities ETF</title>
        <cusip>47103U852</cusip>
        <identifiers>
          <isin value="US47103U8523"/>
        </identifiers>
        <balance>94991.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>4431330.15000000</valUSD>
        <pctVal>10.76838459050</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>
    <signature>
      <ncom:dateSigned>2024-10-15</ncom:dateSigned>
      <ncom:nameOfApplicant>ULTRA SERIES FUND</ncom:nameOfApplicant>
      <ncom:signature>Greg Hoppe</ncom:signature>
      <ncom:signerName>Greg Hoppe</ncom:signerName>
      <ncom:title>Chief Financial Officer</ncom:title>
    </signature>
  </formData>
  <documents>XXXX</documents>
</edgarSubmission>
