<?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>0001766072</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001001385</issuerCik>
      <issuerName>NORTHWEST PIPE CO</issuerName>
      <secFileNumber>000-27140</secFileNumber>
      <issuerAddress>
        <com:street1>201 NE PARK PLAZA DRIVE</com:street1>
        <com:street2>SUITE 100</com:street2>
        <com:city>VANCOUVER</com:city>
        <com:stateOrCountry>WA</com:stateOrCountry>
        <com:zipCode>98684</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>3603976250</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Brittain Miles</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Wells Fargo Clearing Services</name>
        <address>
          <com:street1>1 North Jefferson Avenue</com:street1>
          <com:city>St. Louis</com:city>
          <com:stateOrCountry>MO</com:stateOrCountry>
          <com:zipCode>63103</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>4500</noOfUnitsSold>
      <aggregateMarketValue>186749.09</aggregateMarketValue>
      <noOfUnitsOutstanding>9918711</noOfUnitsOutstanding>
      <approxSaleDate>09/04/2024</approxSaleDate>
      <securitiesExchangeName>Nasdaq</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>01/18/2023</acquiredDate>
      <natureOfAcquisitionTransaction>LTIP</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>1249</amountOfSecuritiesAcquired>
      <paymentDate>01/18/2023</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>01/21/2020</acquiredDate>
      <natureOfAcquisitionTransaction>LTIP</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>221</amountOfSecuritiesAcquired>
      <paymentDate>01/21/2020</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>04/01/2021</acquiredDate>
      <natureOfAcquisitionTransaction>LTIP</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>3030</amountOfSecuritiesAcquired>
      <paymentDate>04/01/2021</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <remarks>shares were sold in account for The Brittain Living Trust, Miles Brittain as trustee.</remarks>
    <noticeSignature>
      <noticeDate>09/04/2024</noticeDate>
      <planAdoptionDates>
        <planAdoptionDate>06/05/2024</planAdoptionDate>
      </planAdoptionDates>
      <signature>Miles Brittain</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
[{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 3972}]
144
0001766072
XXXXXXXX
LIVE
0001001385
NORTHWEST PIPE CO
000-27140
201 NE PARK PLAZA DRIVE
SUITE 100
VANCOUVER
WA
98684
3603976250
Brittain Miles
Officer
Common
Wells Fargo Clearing Services
1 North Jefferson Avenue
St. Louis
MO
63103
4500
186749.09
9918711
09/04/2024
Nasdaq
Common
01/18/2023
LTIP
Issuer
N
1249
01/18/2023
N/A
Common
01/21/2020
LTIP
Issuer
N
221
01/21/2020
N/A
Common
04/01/2021
LTIP
Issuer
N
3030
04/01/2021
N/A
Y
shares were sold in account for The Brittain Living Trust, Miles Brittain as trustee.
09/04/2024
06/05/2024
Miles Brittain