<ARTICLE> 9
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM SOUTHWEST 
BANCORP'S QUARTERLY REPORT ON FORM 10-Q FOR THE QUARTER ENDED JUNE 30, 1998 
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                          21,622
<INT-BEARING-DEPOSITS>                             644
<FED-FUNDS-SOLD>                                     0
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                     99,400
<INVESTMENTS-CARRYING>                          88,223
<INVESTMENTS-MARKET>                            88,763
<LOANS>                                        757,368
<ALLOWANCE>                                      9,043
<TOTAL-ASSETS>                                 994,187
<DEPOSITS>                                     825,380
<SHORT-TERM>                                    64,492
<LIABILITIES-OTHER>                              8,169
<LONG-TERM>                                     25,013
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                        690
<COMMON>                                         3,795
<OTHER-SE>                                      66,648
<TOTAL-LIABILITIES-AND-EQUITY>                 994,187
<INTEREST-LOAN>                                 34,387
<INTEREST-INVEST>                                5,808
<INTEREST-OTHER>                                    34
<INTEREST-TOTAL>                                40,229
<INTEREST-DEPOSIT>                              18,913
<INTEREST-EXPENSE>                              21,272
<INTEREST-INCOME-NET>                           18,957
<LOAN-LOSSES>                                    1,775
<SECURITIES-GAINS>                                  20
<EXPENSE-OTHER>                                 12,892
<INCOME-PRETAX>                                  7,396
<INCOME-PRE-EXTRAORDINARY>                       7,396
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     4,743
<EPS-PRIMARY>                                     1.04
<EPS-DILUTED>                                     1.01
<YIELD-ACTUAL>                                    8.63
<LOANS-NON>                                      1,485
<LOANS-PAST>                                       604
<LOANS-TROUBLED>                                    14
<LOANS-PROBLEM>                                 29,415
<ALLOWANCE-OPEN>                                 8,282
<CHARGE-OFFS>                                    1,486
<RECOVERIES>                                       472
<ALLOWANCE-CLOSE>                                9,043
<ALLOWANCE-DOMESTIC>                             9,043
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                          1,629