<?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">
  <headerData>
    <submissionType>NPORT-P</submissionType>
    <isConfidential>false</isConfidential>
    <filerInfo>

      <filer>
        <issuerCredentials>
          <cik>0001293210</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>


      <seriesClassInfo>
        <seriesId>S000071102</seriesId>
        <classId>C000225728</classId>
        <classId>C000225726</classId>
        <classId>C000225727</classId>
        <classId>C000225729</classId>
        <classId>C000225730</classId>
      </seriesClassInfo>


    </filerInfo>
  </headerData>
  <formData>
    <genInfo>
      <regName>American Century Asset Allocation Portfolios, Inc.</regName>
      <regFileNumber>811-21591</regFileNumber>
      <regCik>0001293210</regCik>
      <regLei>549300OXI8XBS1M19X06</regLei>
      <regStreet1>4500 Main St</regStreet1>
      <regCity>Kansas City</regCity>
      <regStateConditional regCountry="US" regState="US-MO"/>
      <regZipOrPostalCode>64111</regZipOrPostalCode>
      <regPhone>816-531-5575</regPhone>
      <seriesName>One Choice Blend+ 2050 Portfolio</seriesName>
      <seriesId>S000071102</seriesId>
      <seriesLei>5493005VSSETHGOJHR06</seriesLei>
      <repPdEnd>2021-07-31</repPdEnd>
      <repPdDate>2021-04-30</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>454970.960000000000</totAssets>
      <totLiabs>228.180000000000</totLiabs>
      <netAssets>454742.780000000000</netAssets>
      <assetsAttrMiscSec>0.000000000000</assetsAttrMiscSec>
      <assetsInvested>0.000000000000</assetsInvested>
      <amtPayOneYrBanksBorr>0.000000000000</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0.000000000000</amtPayOneYrCtrldComp>
      <amtPayOneYrOthAffil>0.000000000000</amtPayOneYrOthAffil>
      <amtPayOneYrOther>0.000000000000</amtPayOneYrOther>
      <amtPayAftOneYrBanksBorr>0.000000000000</amtPayAftOneYrBanksBorr>
      <amtPayAftOneYrCtrldComp>0.000000000000</amtPayAftOneYrCtrldComp>
      <amtPayAftOneYrOthAffil>0.000000000000</amtPayAftOneYrOthAffil>
      <amtPayAftOneYrOther>0.000000000000</amtPayAftOneYrOther>
      <delayDeliv>0.000000000000</delayDeliv>
      <standByCommit>0.000000000000</standByCommit>
      <liquidPref>0.000000000000</liquidPref>
      <cshNotRptdInCorD>18.070000000000</cshNotRptdInCorD>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
          <monthlyTotReturn classId="C000225726" rtn1="N/A" rtn2=" 0.40 " rtn3="3.784860557769"/>
          <monthlyTotReturn classId="C000225727" rtn1="N/A" rtn2=" 0.40 " rtn3="3.784860557769"/>
          <monthlyTotReturn classId="C000225728" rtn1="N/A" rtn2=" 0.30 " rtn3="3.788634097707"/>
          <monthlyTotReturn classId="C000225729" rtn1="N/A" rtn2=" 0.40 " rtn3="3.784860557769"/>
          <monthlyTotReturn classId="C000225730" rtn1="N/A" rtn2=" 0.30 " rtn3="3.788634097707"/>
        </monthlyTotReturns>
        <othMon1 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
        <othMon2 netRealizedGain="0.0000" netUnrealizedAppr="-1975.9200"/>
        <othMon3 netRealizedGain="32.8700" netUnrealizedAppr="13239.0200"/>
      </returnInfo>
      <mon1Flow redemption="N/A" reinvestment="N/A" sales="N/A"/>
      <mon2Flow redemption="0" reinvestment="0" sales="292983.15"/>
      <mon3Flow redemption="6179.39" reinvestment="0" sales="156594.76"/>


    </fundInfo>
    <invstOrSecs>
      <invstOrSec>
        <name>Avantis Core Fixed Income Fund</name>
        <lei>N/A</lei>
        <title>Avantis Core Fixed Income Fund</title>
        <cusip>025072430</cusip>
        <identifiers>
          <isin value="US0250724301"/>
          <ticker value="AVBNX"/>
        </identifiers>
        <balance>3664.0680000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>36310.9100000000</valUSD>
        <pctVal>7.9849338125</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>Avantis Emerging Markets Equity Fund</name>
        <lei>N/A</lei>
        <title>Avantis Emerging Markets Equity Fund - G Shares</title>
        <cusip>025072455</cusip>
        <identifiers>
          <isin value="US0250724558"/>
          <ticker value="AVENX"/>
        </identifiers>
        <balance>867.6260000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>11539.4300000000</valUSD>
        <pctVal>2.5375729990</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>Avantis International Equity Fund</name>
        <lei>N/A</lei>
        <title>Avantis International Equity Fund - G Shares</title>
        <cusip>025072463</cusip>
        <identifiers>
          <isin value="US0250724632"/>
          <ticker value="AVDNX"/>
        </identifiers>
        <balance>2880.2720000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>34505.6600000000</valUSD>
        <pctVal>7.5879511490</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>Avantis US Equity Fund</name>
        <lei>N/A</lei>
        <title>Avantis US Equity Fund - G Class</title>
        <cusip>025072497</cusip>
        <identifiers>
          <isin value="US0250724970"/>
          <ticker value="AVUNX"/>
        </identifiers>
        <balance>6735.1150000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>94561.0100000000</valUSD>
        <pctVal>20.7943950204</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>American Century NT Global Real Estate - G Class</name>
        <lei>N/A</lei>
        <title>American Century NT Global Real Estate - G Class</title>
        <cusip>025076266</cusip>
        <identifiers>
          <isin value="US0250762665"/>
          <ticker value="ANRHX"/>
        </identifiers>
        <balance>958.8020000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>11706.9700000000</valUSD>
        <pctVal>2.5744158049</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>American Century NT Mid Cap Value - G Class</name>
        <lei>N/A</lei>
        <title>American Century NT Mid Cap Value - G Class</title>
        <cusip>025076589</cusip>
        <identifiers>
          <isin value="US0250765890"/>
          <ticker value="ACLMX"/>
        </identifiers>
        <balance>1004.4870000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>15037.1700000000</valUSD>
        <pctVal>3.3067418904</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>American Century NT Focused Large Cap Value - G Class</name>
        <lei>N/A</lei>
        <title>American Century NT Focused Large Cap Value - G Class</title>
        <cusip>025076597</cusip>
        <identifiers>
          <isin value="US0250765973"/>
          <ticker value="ACLLX"/>
        </identifiers>
        <balance>4838.6720000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>62999.5100000000</valUSD>
        <pctVal>13.8538780099</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>American Century Focused Dynamic Growth Fund - G Class</name>
        <lei>N/A</lei>
        <title>American Century Focused Dynamic Growth Fund - G Class</title>
        <cusip>02507H817</cusip>
        <identifiers>
          <isin value="US02507H8170"/>
          <ticker value="ACFGX"/>
        </identifiers>
        <balance>1036.1420000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>62023.4600000000</valUSD>
        <pctVal>13.6392401876</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>American Century Inflation-Adjusted Bond Fund - G Class</name>
        <lei>N/A</lei>
        <title>American Century Inflation-Adjusted Bond Fund - G Class</title>
        <cusip>025081613</cusip>
        <identifiers>
          <isin value="US0250816131"/>
          <ticker value="AINGX"/>
        </identifiers>
        <balance>262.3910000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>3329.7400000000</valUSD>
        <pctVal>0.7322249294</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>American Century Emerging Markets Debt - G Class</name>
        <lei>N/A</lei>
        <title>American Century Emerging Markets Debt - G Class</title>
        <cusip>025082660</cusip>
        <identifiers>
          <isin value="US0250826601"/>
          <ticker value="AEDGX"/>
        </identifiers>
        <balance>464.3920000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>4927.2000000000</valUSD>
        <pctVal>1.0835136294</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>American Century Global Bond Fund - G Class</name>
        <lei>N/A</lei>
        <title>American Century Global Bond Fund - G Class</title>
        <cusip>025082678</cusip>
        <identifiers>
          <isin value="US0250826783"/>
          <ticker value="AGBGX"/>
        </identifiers>
        <balance>1283.5750000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>13426.1900000000</valUSD>
        <pctVal>2.9524800812</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>American Century Non-US Intrinsic Value Fund</name>
        <lei>N/A</lei>
        <title>American Century Non-US Intrinsic Value Fund - G Class</title>
        <cusip>025086141</cusip>
        <identifiers>
          <isin value="US0250861418"/>
          <ticker value="ANTGX"/>
        </identifiers>
        <balance>1892.1410000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>19356.6000000000</valUSD>
        <pctVal>4.2566041400</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>American Century NT International Small-Mid Cap Fund</name>
        <lei>N/A</lei>
        <title>American Century NT International Small Mid Cap - G Class</title>
        <cusip>025086315</cusip>
        <identifiers>
          <isin value="US0250863158"/>
          <ticker value="ANTMX"/>
        </identifiers>
        <balance>528.8840000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>7832.7700000000</valUSD>
        <pctVal>1.7224616518</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>American Century NT Emerging Markets - G Class</name>
        <lei>N/A</lei>
        <title>American Century NT Emerging Markets - G Class</title>
        <cusip>025086513</cusip>
        <identifiers>
          <isin value="US0250865138"/>
          <ticker value="ACLKX"/>
        </identifiers>
        <balance>1131.3820000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>17298.8300000000</valUSD>
        <pctVal>3.8040911832</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>American Century Small Cap Growth Fund - G Class</name>
        <lei>N/A</lei>
        <title>American Century Small Cap Growth Fund - G Class</title>
        <cusip>02508H253</cusip>
        <identifiers>
          <isin value="US02508H2537"/>
          <ticker value="ANOHX"/>
        </identifiers>
        <balance>299.7930000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>8469.1500000000</valUSD>
        <pctVal>1.8624045004</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>American Century NT Heritage - G Class</name>
        <lei>N/A</lei>
        <title>American Century NT Heritage - G Class</title>
        <cusip>02508H733</cusip>
        <identifiers>
          <isin value="US02508H7338"/>
          <ticker value="ACLWX"/>
        </identifiers>
        <balance>893.4130000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>14705.5800000000</valUSD>
        <pctVal>3.2338237454</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>Focused International Growth - G Class</name>
        <lei>N/A</lei>
        <title>Focused International Growth - G Class</title>
        <cusip>02509A794</cusip>
        <identifiers>
          <isin value="US02509A7946"/>
          <ticker value="AFCGX"/>
        </identifiers>
        <balance>946.7940000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>19210.4500000000</valUSD>
        <pctVal>4.2244650921</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>American Century NT High Income Fund -  G Class</name>
        <lei>N/A</lei>
        <title>American Century NT High Income Fund -  G Class</title>
        <cusip>024932196</cusip>
        <identifiers>
          <isin value="US0249321961"/>
          <ticker value="AHGNX"/>
        </identifiers>
        <balance>912.9450000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>9129.4500000000</valUSD>
        <pctVal>2.0076074655</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>Avantis US Small Cap Value Fund</name>
        <lei>N/A</lei>
        <title>Avantis US Small Cap Value Fund - G Shares</title>
        <cusip>025072422</cusip>
        <identifiers>
          <isin value="US0250724228"/>
          <ticker value="AVCNX"/>
        </identifiers>
        <balance>569.1740000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>8480.6900000000</valUSD>
        <pctVal>1.8649421988</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>2021-06-23</ncom:dateSigned>
      <ncom:nameOfApplicant>American Century Asset Allocation Portfolios, Inc.</ncom:nameOfApplicant>
      <ncom:signature>Amy R. Bitter</ncom:signature>
      <ncom:signerName>Amy R. Bitter</ncom:signerName>
      <ncom:title>Assistant Treasurer</ncom:title>
    </signature>
  </formData>
  <documents>XXXX</documents>
</edgarSubmission>
