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>
    </headerData>
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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>10000</noOfUnitsSold>
        <aggregateMarketValue>1532929.05</aggregateMarketValue>
        <noOfUnitsOutstanding>45125414</noOfUnitsOutstanding>
        <approxSaleDate>01/17/2024</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>01/17/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Option Granted 02/17/2017</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>10000</amountOfSecuritiesAcquired>
        <paymentDate>01/17/2024</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Doug C. Black</name>
          <address>
            <com:street1>300 Colonial Center Parkway</com:street1>
            <com:street2>Suite 600</com:street2>
            <com:city>Roswell</com:city>
            <com:stateOrCountry>GA</com:stateOrCountry>
            <com:zipCode>30076</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>10/18/2023</saleDate>
        <amountOfSecuritiesSold>7960</amountOfSecuritiesSold>
        <grossProceeds>1155171.11</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Doug C. Black</name>
          <address>
            <com:street1>300 Colonial Center Parkway</com:street1>
            <com:street2>Suite 600</com:street2>
            <com:city>Roswell</com:city>
            <com:stateOrCountry>GA</com:stateOrCountry>
            <com:zipCode>30076</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>11/15/2023</saleDate>
        <amountOfSecuritiesSold>8000</amountOfSecuritiesSold>
        <grossProceeds>1122179.20</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Doug C. Black</name>
          <address>
            <com:street1>300 Colonial Center Parkway</com:street1>
            <com:street2>Suite 600</com:street2>
            <com:city>Roswell</com:city>
            <com:stateOrCountry>GA</com:stateOrCountry>
            <com:zipCode>30076</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>12/13/2023</saleDate>
        <amountOfSecuritiesSold>7788</amountOfSecuritiesSold>
        <grossProceeds>1148549.32</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Doug C. Black</name>
          <address>
            <com:street1>300 Colonial Center Parkway</com:street1>
            <com:street2>Suite 600</com:street2>
            <com:city>Roswell</com:city>
            <com:stateOrCountry>GA</com:stateOrCountry>
            <com:zipCode>30076</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>12/14/2023</saleDate>
        <amountOfSecuritiesSold>212</amountOfSecuritiesSold>
        <grossProceeds>33044.44</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Doug C. Black</name>
          <address>
            <com:street1>300 Colonial Center Parkway</com:street1>
            <com:street2>Suite 600</com:street2>
            <com:city>Roswell</com:city>
            <com:stateOrCountry>GA</com:stateOrCountry>
            <com:zipCode>30076</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>12/20/2023</saleDate>
        <amountOfSecuritiesSold>10000</amountOfSecuritiesSold>
        <grossProceeds>1653722.00</grossProceeds>
      </securitiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>01/17/2024</noticeDate>
        <planAdoptionDates>
          <planAdoptionDate>08/09/2023</planAdoptionDate>
        </planAdoptionDates>
        <signature>/s/ Gerardo Ibarra-Munoz, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Doug C Black</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 6268}]
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
  10000
  1532929.05
  45125414
  01/17/2024
  NYSE
  Common
  01/17/2024
  Option Granted 02/17/2017
  Issuer
  N
  10000
  01/17/2024
  Cash
  N
  Doug C. Black
  300 Colonial Center Parkway
  Suite 600
  Roswell
  GA
  30076
  Common
  10/18/2023
  7960
  1155171.11
  Doug C. Black
  300 Colonial Center Parkway
  Suite 600
  Roswell
  GA
  30076
  Common
  11/15/2023
  8000
  1122179.20
  Doug C. Black
  300 Colonial Center Parkway
  Suite 600
  Roswell
  GA
  30076
  Common
  12/13/2023
  7788
  1148549.32
  Doug C. Black
  300 Colonial Center Parkway
  Suite 600
  Roswell
  GA
  30076
  Common
  12/14/2023
  212
  33044.44
  Doug C. Black
  300 Colonial Center Parkway
  Suite 600
  Roswell
  GA
  30076
  Common
  12/20/2023
  10000
  1653722.00
  01/17/2024
  08/09/2023
  /s/ Gerardo Ibarra-Munoz, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Doug C Black