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>Morgan Stanley Smith Barney LLC Executive Services</name>
  <address>
  <street1 xmlns="http://www.sec.gov/edgar/common">200 W Civic Center Dr.</street1>
  <street2 xmlns="http://www.sec.gov/edgar/common">4th Floor</street2>
  <city xmlns="http://www.sec.gov/edgar/common">Sandy</city>
  <stateOrCountry xmlns="http://www.sec.gov/edgar/common">UT</stateOrCountry>
  <zipCode xmlns="http://www.sec.gov/edgar/common">84070</zipCode>
  </address>
  </brokerOrMarketmakerDetails>
  <noOfUnitsSold>50242</noOfUnitsSold>
  <aggregateMarketValue>66821.86</aggregateMarketValue>
  <noOfUnitsOutstanding>99992600</noOfUnitsOutstanding>
  <approxSaleDate>06/02/2025</approxSaleDate>
  <securitiesExchangeName>Nasdaq</securitiesExchangeName>
  </securitiesInformation>
  <securitiesToBeSold>
  <securitiesClassTitle>Common Stock</securitiesClassTitle>
  <acquiredDate>05/30/2025</acquiredDate>
  <natureOfAcquisitionTransaction>Vesting of Restricted Stock Units</natureOfAcquisitionTransaction>
  <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
  <isGiftTransaction>N</isGiftTransaction>
  <amountOfSecuritiesAcquired>98940</amountOfSecuritiesAcquired>
  <paymentDate>05/30/2025</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>03/03/2025</saleDate>
  <amountOfSecuritiesSold>40330</amountOfSecuritiesSold>
  <grossProceeds>59176.82</grossProceeds>
  </securitiesSoldInPast3Months>
  <remarks>(1) The securities to be sold were received upon the settlement of vested restricted stock units, or RSUs.
  The reported shares will be sold to satisfy the reporting person's tax obligations in connection with the vesting of RSUs.</remarks>
  <noticeSignature>
  <noticeDate>05/30/2025</noticeDate>
  <signature>/s/ Cameron Hagen, by power of attorney</signature>
  </noticeSignature>
  </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 3871}]
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
  Morgan Stanley Smith Barney LLC Executive Services
  200 W Civic Center Dr.
  4th Floor
  Sandy
  UT
  84070
  50242
  66821.86
  99992600
  06/02/2025
  Nasdaq
  Common Stock
  05/30/2025
  Vesting of Restricted Stock Units
  Issuer
  N
  98940
  05/30/2025
  (1)
  N
  Arnon Rosenthal
  C/O Alector, Inc.
  131 Oyster Point Blvd., Suite 600
  South San Francisco
  CA
  94080
  Common Stock
  03/03/2025
  40330
  59176.82
  (1) The securities to be sold were received upon the settlement of vested restricted stock units, or RSUs.
  The reported shares will be sold to satisfy the reporting person's tax obligations in connection with the vesting of RSUs.
  05/30/2025
  /s/ Cameron Hagen, by power of attorney