content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <!-- Generated by Workiva -->
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001886457</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001846069</issuerCik>
        <issuerName>Nextdoor Holdings, Inc.</issuerName>
        <secFileNumber>001-40246</secFileNumber>
        <issuerAddress>
          <com:street1>420 Taylor Street</com:street1>
          <com:city>San Francisco</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>94102</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>415-344-0333</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>John Orta</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Former Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Class A Common Stock</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>J.P. Morgan Securities LLC</name>
          <address>
            <com:street1>390 Madison Avenue</com:street1>
            <com:street2>6th Floor</com:street2>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10017</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>200000</noOfUnitsSold>
        <aggregateMarketValue>520000</aggregateMarketValue>
        <noOfUnitsOutstanding>189105696</noOfUnitsOutstanding>
        <approxSaleDate>07/03/2024</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Class A Common Stock</securitiesClassTitle>
        <acquiredDate>08/18/2020</acquiredDate>
        <natureOfAcquisitionTransaction>Option Exercise</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>153946</amountOfSecuritiesAcquired>
        <paymentDate>08/18/2020</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Class A Common Stock</securitiesClassTitle>
        <acquiredDate>03/08/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Option Exercise</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>46053</amountOfSecuritiesAcquired>
        <paymentDate>03/08/2021</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>John Joseph Orta</name>
          <address>
            <com:street1>Care of NextDoor Holdings Inc</com:street1>
            <com:street2>420 Taylor Street</com:street2>
            <com:city>San Francisco</com:city>
            <com:stateOrCountry>CA</com:stateOrCountry>
            <com:zipCode>94102</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Class A Common</securitiesClassTitle>
        <saleDate>06/04/2024</saleDate>
        <amountOfSecuritiesSold>10000</amountOfSecuritiesSold>
        <grossProceeds>24016</grossProceeds>
      </securitiesSoldInPast3Months>
      <remarks>The shares represented on this Form 144 are being sold by John Orta Trust, John Orta as trustee</remarks>
      <noticeSignature>
        <noticeDate>07/03/2024</noticeDate>
        <signature>/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for John Orta</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 4186}]
text: 144
  0001886457
  XXXXXXXX
  LIVE
  0001846069
  Nextdoor Holdings, Inc.
  001-40246
  420 Taylor Street
  San Francisco
  CA
  94102
  415-344-0333
  John Orta
  Former Officer
  Class A Common Stock
  J.P. Morgan Securities LLC
  390 Madison Avenue
  6th Floor
  New York
  NY
  10017
  200000
  520000
  189105696
  07/03/2024
  NYSE
  Class A Common Stock
  08/18/2020
  Option Exercise
  Issuer
  N
  153946
  08/18/2020
  Cash
  Class A Common Stock
  03/08/2021
  Option Exercise
  Issuer
  N
  46053
  03/08/2021
  Cash
  N
  John Joseph Orta
  Care of NextDoor Holdings Inc
  420 Taylor Street
  San Francisco
  CA
  94102
  Class A Common
  06/04/2024
  10000
  24016
  The shares represented on this Form 144 are being sold by John Orta Trust, John Orta as trustee
  07/03/2024
  /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for John Orta