<ARTICLE> 9
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM SOUTHWEST
BANCORP'S QUARTERLY REPORT ON FORM 10-Q FOR THE QUARTER ENDED SEPTEMBER 30,
2000, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               SEP-30-2000
<CASH>                                          29,924
<INT-BEARING-DEPOSITS>                           1,363
<FED-FUNDS-SOLD>                                     0
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                    158,337
<INVESTMENTS-CARRYING>                          66,703
<INVESTMENTS-MARKET>                            66,288
<LOANS>                                        914,666
<ALLOWANCE>                                     11,845
<TOTAL-ASSETS>                               1,204,017
<DEPOSITS>                                     934,159
<SHORT-TERM>                                   164,257
<LIABILITIES-OTHER>                             11,280
<LONG-TERM>                                     25,013
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         4,081
<OTHER-SE>                                      65,227
<TOTAL-LIABILITIES-AND-EQUITY>               1,204,017
<INTEREST-LOAN>                                 61,059
<INTEREST-INVEST>                               10,101
<INTEREST-OTHER>                                   115
<INTEREST-TOTAL>                                71,275
<INTEREST-DEPOSIT>                              32,766
<INTEREST-EXPENSE>                              41,661
<INTEREST-INCOME-NET>                           29,614
<LOAN-LOSSES>                                    2,725
<SECURITIES-GAINS>                                   0
<EXPENSE-OTHER>                                 21,963
<INCOME-PRETAX>                                 11,264
<INCOME-PRE-EXTRAORDINARY>                      11,264
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     7,435
<EPS-BASIC>                                       1.94
<EPS-DILUTED>                                     1.92
<YIELD-ACTUAL>                                    8.52
<LOANS-NON>                                     11,821
<LOANS-PAST>                                       249
<LOANS-TROUBLED>                                     0
<LOANS-PROBLEM>                                 36,980
<ALLOWANCE-OPEN>                                11,190
<CHARGE-OFFS>                                    2,572
<RECOVERIES>                                       502
<ALLOWANCE-CLOSE>                               11,845
<ALLOWANCE-DOMESTIC>                            11,845
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                          4,397