content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <headerData>
  <submissionType>144</submissionType>
  <filerInfo>
  <filer>
  <filerCredentials>
  <cik>0001776456</cik>
  <ccc>XXXXXXXX</ccc>
  </filerCredentials>
  </filer>
  <liveTestFlag>LIVE</liveTestFlag>
  </filerInfo>
  </headerData>
  <formData>
  <issuerInfo>
  <issuerCik>0000075677</issuerCik>
  <issuerName>PACKAGING CORPORATION OF AMERICA</issuerName>
  <secFileNumber>001-15399</secFileNumber>
  <issuerAddress>
  <street1 xmlns="http://www.sec.gov/edgar/common">1 North Field Court</street1>
  <city xmlns="http://www.sec.gov/edgar/common">Lake Forest</city>
  <stateOrCountry xmlns="http://www.sec.gov/edgar/common">IL</stateOrCountry>
  <zipCode xmlns="http://www.sec.gov/edgar/common">60045</zipCode>
  </issuerAddress>
  <issuerContactPhone>847-482-3000</issuerContactPhone>
  <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Bruce A. Ridley</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
  <relationshipsToIssuer>
  <relationshipToIssuer>Officer</relationshipToIssuer>
  </relationshipsToIssuer>
  </issuerInfo>
  <securitiesInformation>
  <securitiesClassTitle>Common</securitiesClassTitle>
  <brokerOrMarketmakerDetails>
  <name>Woodbury Financial</name>
  <address>
  <street1 xmlns="http://www.sec.gov/edgar/common">7755 3rd Street N</street1>
  <city xmlns="http://www.sec.gov/edgar/common">Oakdale</city>
  <stateOrCountry xmlns="http://www.sec.gov/edgar/common">MN</stateOrCountry>
  <zipCode xmlns="http://www.sec.gov/edgar/common">55128</zipCode>
  </address>
  </brokerOrMarketmakerDetails>
  <noOfUnitsSold>3493</noOfUnitsSold>
  <aggregateMarketValue>542183.46</aggregateMarketValue>
  <noOfUnitsOutstanding>89932185</noOfUnitsOutstanding>
  <approxSaleDate>08/02/2023</approxSaleDate>
  <securitiesExchangeName>NYSE</securitiesExchangeName>
  </securitiesInformation>
  <securitiesToBeSold>
  <securitiesClassTitle>Common</securitiesClassTitle>
  <acquiredDate>06/28/2023</acquiredDate>
  <natureOfAcquisitionTransaction>restricted stock vesting under a registered plan</natureOfAcquisitionTransaction>
  <nameOfPersonfromWhomAcquired>issuer</nameOfPersonfromWhomAcquired>
  <isGiftTransaction>N</isGiftTransaction>
  <amountOfSecuritiesAcquired>1967</amountOfSecuritiesAcquired>
  <paymentDate>06/28/2023</paymentDate>
  <natureOfPayment>services rendered</natureOfPayment>
  </securitiesToBeSold>
  <securitiesToBeSold>
  <securitiesClassTitle>common</securitiesClassTitle>
  <acquiredDate>06/26/2022</acquiredDate>
  <natureOfAcquisitionTransaction>restricted stock vesting under a registered plan</natureOfAcquisitionTransaction>
  <nameOfPersonfromWhomAcquired>issuer</nameOfPersonfromWhomAcquired>
  <isGiftTransaction>N</isGiftTransaction>
  <amountOfSecuritiesAcquired>1526</amountOfSecuritiesAcquired>
  <paymentDate>06/26/2022</paymentDate>
  <natureOfPayment>services rendered</natureOfPayment>
  </securitiesToBeSold>
  <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
  <noticeSignature>
  <noticeDate>08/07/2023</noticeDate>
  <signature>/s/ Bruce A. Ridley</signature>
  </noticeSignature>
  </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 3193}]
text: 144
  0001776456
  XXXXXXXX
  LIVE
  0000075677
  PACKAGING CORPORATION OF AMERICA
  001-15399
  1 North Field Court
  Lake Forest
  IL
  60045
  847-482-3000
  Bruce A. Ridley
  Officer
  Common
  Woodbury Financial
  7755 3rd Street N
  Oakdale
  MN
  55128
  3493
  542183.46
  89932185
  08/02/2023
  NYSE
  Common
  06/28/2023
  restricted stock vesting under a registered plan
  issuer
  N
  1967
  06/28/2023
  services rendered
  common
  06/26/2022
  restricted stock vesting under a registered plan
  issuer
  N
  1526
  06/26/2022
  services rendered
  Y
  08/07/2023
  /s/ Bruce A. Ridley