<ARTICLE> 9
<LEGEND>
THE FINANCIAL DATA SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM INTERNATIONAL BANCSHARES CORPORATION FORM 10-Q FOR THE QUARTER ENDED
SEPTEMBER 30, 2000 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>                      1

                                     
<PERIOD-TYPE>                           9-MOS
<FISCAL-YEAR-END>                 DEC-31-2000
<PERIOD-END>                      SEP-30-2000
<CASH>                                101,980
<INT-BEARING-DEPOSITS>                  2,372
<FED-FUNDS-SOLD>                       23,500
<TRADING-ASSETS>                            0
<INVESTMENTS-HELD-FOR-SALE>         3,098,837
<INVESTMENTS-CARRYING>                  2,170
<INVESTMENTS-MARKET>                    2,170
<LOANS>                             2,222,210
<ALLOWANCE>                            30,354
<TOTAL-ASSETS>                      5,844,963
<DEPOSITS>                          3,706,056
<SHORT-TERM>                        1,609,000
<LIABILITIES-OTHER>                    50,153
<LONG-TERM>                                 0
<PREFERRED-MANDATORY>                       0
<PREFERRED>                                 0
<COMMON>                               26,458
<OTHER-SE>                            328,915
<TOTAL-LIABILITIES-AND-EQUITY>      5,844,963
<INTEREST-LOAN>                       156,255
<INTEREST-INVEST>                     153,958
<INTEREST-OTHER>                          247
<INTEREST-TOTAL>                      310,460
<INTEREST-DEPOSIT>                    108,859
<INTEREST-EXPENSE>                    182,648
<INTEREST-INCOME-NET>                 127,812
<LOAN-LOSSES>                           5,090
<SECURITIES-GAINS>                       (884)
<EXPENSE-OTHER>                        80,502
<INCOME-PRETAX>                        85,961
<INCOME-PRE-EXTRAORDINARY>             85,961
<EXTRAORDINARY>                             0
<CHANGES>                                   0
<NET-INCOME>                           59,007
<EPS-BASIC>                              3.06
<EPS-DILUTED>                            3.02
<YIELD-ACTUAL>                              0
<LOANS-NON>                                 0
<LOANS-PAST>                                0
<LOANS-TROUBLED>                            0
<LOANS-PROBLEM>                             0
<ALLOWANCE-OPEN>                            0
<CHARGE-OFFS>                               0
<RECOVERIES>                                0
<ALLOWANCE-CLOSE>                           0
<ALLOWANCE-DOMESTIC>                        0
<ALLOWANCE-FOREIGN>                         0
<ALLOWANCE-UNALLOCATED>                     0