<?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>0001060529</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0000315709</issuerCik>
      <issuerName>INTERNATIONAL BANCSHARES CORP</issuerName>
      <secFileNumber>000-09439</secFileNumber>
      <issuerAddress>
        <com:street1>12OO SAN BERNARDO AVE</com:street1>
        <com:street2>PO BOX 1359</com:street2>
        <com:city>LAREDO</com:city>
        <com:stateOrCountry>TX</com:stateOrCountry>
        <com:zipCode>78040-1359</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>9567227611</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>SANCHEZ ANTONIO R JR</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Director</relationshipToIssuer>
        <relationshipToIssuer>10% Stockholder</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Charles Schwab Corporation</name>
        <address>
          <com:street1>3000 Schwab Way</com:street1>
          <com:city>Westlake</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>76262</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>60000</noOfUnitsSold>
      <aggregateMarketValue>2732400.00</aggregateMarketValue>
      <noOfUnitsOutstanding>62058463</noOfUnitsOutstanding>
      <approxSaleDate>11/21/2023</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>02/01/1987</acquiredDate>
      <natureOfAcquisitionTransaction>Gift</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Antonio R Sanchez, Jr. &amp; Maria J Sanchez</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>60000</amountOfSecuritiesAcquired>
      <paymentDate>02/01/1987</paymentDate>
      <natureOfPayment>n/a</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Antonio Sanchez Jr</name>
        <address>
          <com:street1>1360 Post Oak Blvd</com:street1>
          <com:street2>Suite 2400</com:street2>
          <com:city>Houston</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>77056</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>11/15/2023</saleDate>
      <amountOfSecuritiesSold>30000</amountOfSecuritiesSold>
      <grossProceeds>1433100.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Antonio Sanchez Jr</name>
        <address>
          <com:street1>1360 Post Oak Blvd</com:street1>
          <com:street2>Suite 2400</com:street2>
          <com:city>Houston</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>77056</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>11/16/2023</saleDate>
      <amountOfSecuritiesSold>30000</amountOfSecuritiesSold>
      <grossProceeds>1398600.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <remarks>Shares acquired between 02/01/1987-12/31/1988</remarks>
    <noticeSignature>
      <noticeDate>11/21/2023</noticeDate>
      <signature>Antonio Sanchez Jr TTEE, 1988 Trust Number Four 4/27/1988</signature>
    </noticeSignature>
  </formData>
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144
0001060529
XXXXXXXX
LIVE
0000315709
INTERNATIONAL BANCSHARES CORP
000-09439
12OO SAN BERNARDO AVE
PO BOX 1359
LAREDO
TX
78040-1359
9567227611
SANCHEZ ANTONIO R JR
Director
10% Stockholder
Common
Charles Schwab Corporation
3000 Schwab Way
Westlake
TX
76262
60000
2732400.00
62058463
11/21/2023
NASDAQ
Common
02/01/1987
Gift
Antonio R Sanchez, Jr. & Maria J Sanchez
N
60000
02/01/1987
n/a
N
Antonio Sanchez Jr
1360 Post Oak Blvd
Suite 2400
Houston
TX
77056
Common
11/15/2023
30000
1433100.00
Antonio Sanchez Jr
1360 Post Oak Blvd
Suite 2400
Houston
TX
77056
Common
11/16/2023
30000
1398600.00
Shares acquired between 02/01/1987-12/31/1988
11/21/2023
Antonio Sanchez Jr TTEE, 1988 Trust Number Four 4/27/1988