content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
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      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001267655</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
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      <issuerInfo>
        <issuerCik>0001015328</issuerCik>
        <issuerName>Wintrust Financial Corporation</issuerName>
        <secFileNumber>001-35077</secFileNumber>
        <issuerAddress>
          <com:street1>9700 West Higgins Road</com:street1>
          <com:city>Rosemont</com:city>
          <com:stateOrCountry>IL</com:stateOrCountry>
          <com:zipCode>60018</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>847-939-9000</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Mary Beth Murphy</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Spouse of Executive Richard Murphy</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Wintrust Investments, LLC</name>
          <address>
            <com:street1>231 S. LaSalle Street, 13th Floor</com:street1>
            <com:city>Chicago</com:city>
            <com:stateOrCountry>IL</com:stateOrCountry>
            <com:zipCode>60604</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>4099</noOfUnitsSold>
        <aggregateMarketValue>475729.94</aggregateMarketValue>
        <noOfUnitsOutstanding>66500386</noOfUnitsOutstanding>
        <approxSaleDate>10/29/2024</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>11/08/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Equity Grant</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Wintrust Financial Corporation</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1376</amountOfSecuritiesAcquired>
        <paymentDate>11/08/2022</paymentDate>
        <natureOfPayment>Equity Grant</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>03/10/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Equity Grant</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Wintrust Financial Corporation</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>2723</amountOfSecuritiesAcquired>
        <paymentDate>03/10/2023</paymentDate>
        <natureOfPayment>Equity Grant</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>10/29/2024</noticeDate>
        <signature>/s/Richard B. Murphy</signature>
      </noticeSignature>
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text: 144
  0001267655
  XXXXXXXX
  LIVE
  0001015328
  Wintrust Financial Corporation
  001-35077
  9700 West Higgins Road
  Rosemont
  IL
  60018
  847-939-9000
  Mary Beth Murphy
  Spouse of Executive Richard Murphy
  Common Stock
  Wintrust Investments, LLC
  231 S. LaSalle Street, 13th Floor
  Chicago
  IL
  60604
  4099
  475729.94
  66500386
  10/29/2024
  NASDAQ
  Common Stock
  11/08/2022
  Equity Grant
  Wintrust Financial Corporation
  N
  1376
  11/08/2022
  Equity Grant
  Common Stock
  03/10/2023
  Equity Grant
  Wintrust Financial Corporation
  N
  2723
  03/10/2023
  Equity Grant
  Y
  10/29/2024
  /s/Richard B. Murphy