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      <issuerName>PACKAGING CORP OF AMERICA</issuerName>
      <secFileNumber>001-15399</secFileNumber>
      <issuerAddress>
        <com:street1>1 NORTH FIELD CT</com:street1>
        <com:city>LAKE FOREST</com:city>
        <com:stateOrCountry>IL</com:stateOrCountry>
        <com:zipCode>60045</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>8474823000</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Hassfurther Thomas A</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
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      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Charles Schwab Corporation</name>
        <address>
          <com:street1>3000 Schwab Way</com:street1>
          <com:city>Westlake</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>76262</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>19738</noOfUnitsSold>
      <aggregateMarketValue>4788044.00</aggregateMarketValue>
      <noOfUnitsOutstanding>89811810</noOfUnitsOutstanding>
      <approxSaleDate>11/06/2024</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
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    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>06/21/2015</acquiredDate>
      <natureOfAcquisitionTransaction>Executive compensation</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>19738</amountOfSecuritiesAcquired>
      <paymentDate>06/21/2015</paymentDate>
      <natureOfPayment>Equity Compensation</natureOfPayment>
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    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <remarks>Shares to be sold in THOMAS A HASSFURTHER TRUST</remarks>
    <noticeSignature>
      <noticeDate>11/06/2024</noticeDate>
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144
0001318252
XXXXXXXX
LIVE
0000075677
PACKAGING CORP OF AMERICA
001-15399
1 NORTH FIELD CT
LAKE FOREST
IL
60045
8474823000
Hassfurther Thomas A
Officer
Common
Charles Schwab Corporation
3000 Schwab Way
Westlake
TX
76262
19738
4788044.00
89811810
11/06/2024
NYSE
Common
06/21/2015
Executive compensation
Issuer
N
19738
06/21/2015
Equity Compensation
Y
Shares to be sold in THOMAS A HASSFURTHER TRUST
11/06/2024
Thomas Hassfurther