content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
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      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001672083</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
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      <issuerInfo>
        <issuerCik>0001650729</issuerCik>
        <issuerName>SiteOne Landscape Supply, Inc.</issuerName>
        <secFileNumber>001-37760</secFileNumber>
        <issuerAddress>
          <com:street1>MANSELL OVERLOOK</com:street1>
          <com:street2>300 COLONIAL CENTER PARKWAY, SUITE 600</com:street2>
          <com:city>ROSWELL</com:city>
          <com:stateOrCountry>GA</com:stateOrCountry>
          <com:zipCode>30076</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>(470) 277-7000</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>BLACK DOUG</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
          <relationshipToIssuer>Director</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>29760</noOfUnitsSold>
        <aggregateMarketValue>3847463.91</aggregateMarketValue>
        <noOfUnitsOutstanding>44809549</noOfUnitsOutstanding>
        <approxSaleDate>07/11/2025</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>07/11/2025</acquiredDate>
        <natureOfAcquisitionTransaction>Options Granted 02/06/2019</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>29760</amountOfSecuritiesAcquired>
        <paymentDate>07/11/2025</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>07/11/2025</noticeDate>
        <planAdoptionDates>
          <planAdoptionDate>11/27/2024</planAdoptionDate>
        </planAdoptionDates>
        <signature>/s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Doug Black</signature>
      </noticeSignature>
    </formData>
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text: 144
  0001672083
  XXXXXXXX
  LIVE
  0001650729
  SiteOne Landscape Supply, Inc.
  001-37760
  MANSELL OVERLOOK
  300 COLONIAL CENTER PARKWAY, SUITE 600
  ROSWELL
  GA
  30076
  (470) 277-7000
  BLACK DOUG
  Officer
  Director
  Common
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  29760
  3847463.91
  44809549
  07/11/2025
  NYSE
  Common
  07/11/2025
  Options Granted 02/06/2019
  Issuer
  N
  29760
  07/11/2025
  Cash
  Y
  07/11/2025
  11/27/2024
  /s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Doug Black