content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001275634</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0000944695</issuerCik>
        <issuerName>HANOVER INSURANCE GROUP, INC.</issuerName>
        <secFileNumber>001-13754</secFileNumber>
        <issuerAddress>
          <com:street1>440 LINCOLN ST</com:street1>
          <com:city>WORCESTER</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>01653</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>5088551000</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>FARBER JEFFREY M</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Fidelity Brokerage Services LLC</name>
          <address>
            <com:street1>900 Salem Street</com:street1>
            <com:city>Smithfield</com:city>
            <com:stateOrCountry>RI</com:stateOrCountry>
            <com:zipCode>02917</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>300</noOfUnitsSold>
        <aggregateMarketValue>45007.50</aggregateMarketValue>
        <noOfUnitsOutstanding>35983721</noOfUnitsOutstanding>
        <approxSaleDate>10/01/2024</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>05/17/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Stock Option Exercise</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>300</amountOfSecuritiesAcquired>
        <paymentDate>05/17/2022</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Jeffrey M. Farber</name>
          <address>
            <com:street1>440 Lincoln Street</com:street1>
            <com:city>Worcester</com:city>
            <com:stateOrCountry>MA</com:stateOrCountry>
            <com:zipCode>01653</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>09/17/2024</saleDate>
        <amountOfSecuritiesSold>300</amountOfSecuritiesSold>
        <grossProceeds>45001.00</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Jeffrey M. Farber</name>
          <address>
            <com:street1>440 Lincoln Street</com:street1>
            <com:city>Worcester</com:city>
            <com:stateOrCountry>MA</com:stateOrCountry>
            <com:zipCode>01653</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>09/18/2024</saleDate>
        <amountOfSecuritiesSold>2550</amountOfSecuritiesSold>
        <grossProceeds>382600.15</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Jeffrey M. Farber</name>
          <address>
            <com:street1>440 Lincoln Street</com:street1>
            <com:city>Worcester</com:city>
            <com:stateOrCountry>MA</com:stateOrCountry>
            <com:zipCode>01653</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>09/19/2024</saleDate>
        <amountOfSecuritiesSold>1200</amountOfSecuritiesSold>
        <grossProceeds>180134.00</grossProceeds>
      </securitiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>10/01/2024</noticeDate>
        <planAdoptionDates>
          <planAdoptionDate>02/15/2023</planAdoptionDate>
        </planAdoptionDates>
        <signature>/s/ Eric Janiak, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Jeffrey M. Farber</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 4690}]
text: 144
  0001275634
  XXXXXXXX
  LIVE
  0000944695
  HANOVER INSURANCE GROUP, INC.
  001-13754
  440 LINCOLN ST
  WORCESTER
  MA
  01653
  5088551000
  FARBER JEFFREY M
  Officer
  Common
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  300
  45007.50
  35983721
  10/01/2024
  NYSE
  Common
  05/17/2022
  Stock Option Exercise
  Issuer
  N
  300
  05/17/2022
  Cash
  N
  Jeffrey M. Farber
  440 Lincoln Street
  Worcester
  MA
  01653
  Common
  09/17/2024
  300
  45001.00
  Jeffrey M. Farber
  440 Lincoln Street
  Worcester
  MA
  01653
  Common
  09/18/2024
  2550
  382600.15
  Jeffrey M. Farber
  440 Lincoln Street
  Worcester
  MA
  01653
  Common
  09/19/2024
  1200
  180134.00
  10/01/2024
  02/15/2023
  /s/ Eric Janiak, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Jeffrey M. Farber