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    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001410554</cik>
          <ccc>XXXXXXXX</ccc>
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      <liveTestFlag>LIVE</liveTestFlag>



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    <issuerInfo>
      <issuerCik>0001541119</issuerCik>
      <issuerName>Sound Financial Bancorp, Inc.</issuerName>
      <secFileNumber>001-35633</secFileNumber>
      <issuerAddress>
        <com:street1>2400 3RD AVENUE</com:street1>
        <com:street2>SUITE 150</com:street2>
        <com:city>SEATTLE</com:city>
        <com:stateOrCountry>WA</com:stateOrCountry>
        <com:zipCode>98121</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>206-448-0884</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Haddad David S Jr</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Director</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Charles Schwab &amp; Co.</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>1000</noOfUnitsSold>
      <aggregateMarketValue>36000.00</aggregateMarketValue>
      <noOfUnitsOutstanding>2601647</noOfUnitsOutstanding>
      <approxSaleDate>05/11/2023</approxSaleDate>
      <securitiesExchangeName>Nasdaq</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>05/31/2021</acquiredDate>
      <natureOfAcquisitionTransaction>Stock Awards</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>355</amountOfSecuritiesAcquired>
      <paymentDate>05/31/2021</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>02/07/2020</acquiredDate>
      <natureOfAcquisitionTransaction>Stock Awards</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>831</amountOfSecuritiesAcquired>
      <paymentDate>02/07/2020</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>05/11/2023</noticeDate>
      <signature>David S. Haddad Jr.</signature>
    </noticeSignature>
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144
0001410554
XXXXXXXX
LIVE
0001541119
Sound Financial Bancorp, Inc.
001-35633
2400 3RD AVENUE
SUITE 150
SEATTLE
WA
98121
206-448-0884
Haddad David S Jr
Director
Common
Charles Schwab & Co.
3000 SCHWAB WAY
WESTLAKE
TX
76262
1000
36000.00
2601647
05/11/2023
Nasdaq
Common
05/31/2021
Stock Awards
Issuer
N
355
05/31/2021
Compensation
Common
02/07/2020
Stock Awards
Issuer
N
831
02/07/2020
Compensation
Y
05/11/2023
David S. Haddad Jr.