<ARTICLE> 9 <LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM SOUTHWEST BANCORP'S QUARTERLY REPORT ON FORM 10-Q FOR THE QUARTER ENDED MARCH 31, 1998, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. </LEGEND> <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-START> JAN-01-1998 <PERIOD-END> MAR-31-1998 <CASH> 20,805 <INT-BEARING-DEPOSITS> 1,022 <FED-FUNDS-SOLD> 0 <TRADING-ASSETS> 0 <INVESTMENTS-HELD-FOR-SALE> 101,820 <INVESTMENTS-CARRYING> 86,395 <INVESTMENTS-MARKET> 87,041 <LOANS> 753,965 <ALLOWANCE> 8,897 <TOTAL-ASSETS> 985,900 <DEPOSITS> 839,227 <SHORT-TERM> 42,825 <LIABILITIES-OTHER> 9,047 <LONG-TERM> 25,013 <PREFERRED-MANDATORY> 0 <PREFERRED> 690 <COMMON> 3,791 <OTHER-SE> 65,307 <TOTAL-LIABILITIES-AND-EQUITY> 985,900 <INTEREST-LOAN> 16,996 <INTEREST-INVEST> 2,918 <INTEREST-OTHER> 33 <INTEREST-TOTAL> 19,947 <INTEREST-DEPOSIT> 9,651 <INTEREST-EXPENSE> 10,638 <INTEREST-INCOME-NET> 9,309 <LOAN-LOSSES> 825 <SECURITIES-GAINS> 17 <EXPENSE-OTHER> 6,452 <INCOME-PRETAX> 3,644 <INCOME-PRE-EXTRAORDINARY> 3,644 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 2,333 <EPS-PRIMARY> 0.51 <EPS-DILUTED> 0.50 <YIELD-ACTUAL> 8.65 <LOANS-NON> 5,266 <LOANS-PAST> 1,645 <LOANS-TROUBLED> 0 <LOANS-PROBLEM> 27,916 <ALLOWANCE-OPEN> 8,282 <CHARGE-OFFS> 498 <RECOVERIES> 288 <ALLOWANCE-CLOSE> 8,897 <ALLOWANCE-DOMESTIC> 8,897 <ALLOWANCE-FOREIGN> 0 <ALLOWANCE-UNALLOCATED> 1,417