content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <headerData>
  <submissionType>144</submissionType>
  <filerInfo>
  <filer>
  <filerCredentials>
  <cik>0001757770</cik>
  <ccc>XXXXXXXX</ccc>
  </filerCredentials>
  </filer>
  <liveTestFlag>LIVE</liveTestFlag>
  </filerInfo>
  </headerData>
  <formData>
  <issuerInfo>
  <issuerCik>0001653087</issuerCik>
  <issuerName>Alector, Inc.</issuerName>
  <secFileNumber>001-38792</secFileNumber>
  <issuerAddress>
  <street1 xmlns="http://www.sec.gov/edgar/common">131 Oyster Point Blvd.</street1>
  <street2 xmlns="http://www.sec.gov/edgar/common">Suite 600</street2>
  <city xmlns="http://www.sec.gov/edgar/common">South San Francisco</city>
  <stateOrCountry xmlns="http://www.sec.gov/edgar/common">CA</stateOrCountry>
  <zipCode xmlns="http://www.sec.gov/edgar/common">94080</zipCode>
  </issuerAddress>
  <issuerContactPhone>(415)-231-5660</issuerContactPhone>
  <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Arnon Rosenthal</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
  <relationshipsToIssuer>
  <relationshipToIssuer>Officer</relationshipToIssuer>
  <relationshipToIssuer>Director</relationshipToIssuer>
  </relationshipsToIssuer>
  </issuerInfo>
  <securitiesInformation>
  <securitiesClassTitle>Common Stock</securitiesClassTitle>
  <brokerOrMarketmakerDetails>
  <name>E*TRADE Financial Corporation</name>
  <address>
  <street1 xmlns="http://www.sec.gov/edgar/common">3 Edison Drive</street1>
  <city xmlns="http://www.sec.gov/edgar/common">Alpharetta</city>
  <stateOrCountry xmlns="http://www.sec.gov/edgar/common">GA</stateOrCountry>
  <zipCode xmlns="http://www.sec.gov/edgar/common">30005</zipCode>
  </address>
  </brokerOrMarketmakerDetails>
  <noOfUnitsSold>5233</noOfUnitsSold>
  <aggregateMarketValue>29148</aggregateMarketValue>
  <noOfUnitsOutstanding>83830300</noOfUnitsOutstanding>
  <approxSaleDate>09/05/2023</approxSaleDate>
  <securitiesExchangeName>Nasdaq</securitiesExchangeName>
  </securitiesInformation>
  <securitiesToBeSold>
  <securitiesClassTitle>Common Stock</securitiesClassTitle>
  <acquiredDate>09/01/2023</acquiredDate>
  <natureOfAcquisitionTransaction>Vesting of Restricted Stock Units</natureOfAcquisitionTransaction>
  <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
  <isGiftTransaction>N</isGiftTransaction>
  <amountOfSecuritiesAcquired>14931</amountOfSecuritiesAcquired>
  <paymentDate>09/01/2023</paymentDate>
  <natureOfPayment>(1)</natureOfPayment>
  </securitiesToBeSold>
  <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
  <securitiesSoldInPast3Months>
  <sellerDetails>
  <name>Arnon Rosenthal</name>
  <address>
  <street1 xmlns="http://www.sec.gov/edgar/common">C/O Alector, Inc.</street1>
  <street2 xmlns="http://www.sec.gov/edgar/common">131 Oyster Point Blvd., Suite 600</street2>
  <city xmlns="http://www.sec.gov/edgar/common">South San Francisco</city>
  <stateOrCountry xmlns="http://www.sec.gov/edgar/common">CA</stateOrCountry>
  <zipCode xmlns="http://www.sec.gov/edgar/common">94080</zipCode>
  </address>
  </sellerDetails>
  <securitiesClassTitle>Common Stock</securitiesClassTitle>
  <saleDate>06/02/2023</saleDate>
  <amountOfSecuritiesSold>5255</amountOfSecuritiesSold>
  <grossProceeds>36279</grossProceeds>
  </securitiesSoldInPast3Months>
  <remarks>(1) The securities to be sold were received upon the settlement of vested restricted stock units.</remarks>
  <noticeSignature>
  <noticeDate>09/01/2023</noticeDate>
  <signature>/s/ Jordan Hochstrasser, by power of attorney</signature>
  </noticeSignature>
  </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 3644}]
text: 144
  0001757770
  XXXXXXXX
  LIVE
  0001653087
  Alector, Inc.
  001-38792
  131 Oyster Point Blvd.
  Suite 600
  South San Francisco
  CA
  94080
  (415)-231-5660
  Arnon Rosenthal
  Officer
  Director
  Common Stock
  E*TRADE Financial Corporation
  3 Edison Drive
  Alpharetta
  GA
  30005
  5233
  29148
  83830300
  09/05/2023
  Nasdaq
  Common Stock
  09/01/2023
  Vesting of Restricted Stock Units
  Issuer
  N
  14931
  09/01/2023
  (1)
  N
  Arnon Rosenthal
  C/O Alector, Inc.
  131 Oyster Point Blvd., Suite 600
  South San Francisco
  CA
  94080
  Common Stock
  06/02/2023
  5255
  36279
  (1) The securities to be sold were received upon the settlement of vested restricted stock units.
  09/01/2023
  /s/ Jordan Hochstrasser, by power of attorney