<ARTICLE> 9 <LEGEND> RESTATED FINANCIAL DATA SCHEDULE THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM SOUTHWEST BANCORP'S QUARTERLY REPORT ON FORM 10-Q FOR THE QUARTER ENDED MARCH 31, 1999, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. </LEGEND> <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-START> JAN-01-1999 <PERIOD-END> MAR-31-1999 <CASH> 21,525 <INT-BEARING-DEPOSITS> 1,223 <FED-FUNDS-SOLD> 0 <TRADING-ASSETS> 0 <INVESTMENTS-HELD-FOR-SALE> 99,287 <INVESTMENTS-CARRYING> 72,990 <INVESTMENTS-MARKET> 73,823 <LOANS> 813,606 <ALLOWANCE> 10,982 <TOTAL-ASSETS> 1,037,285 <DEPOSITS> 844,420 <SHORT-TERM> 94,368 <LIABILITIES-OTHER> 8,315 <LONG-TERM> 25,013 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 4,080 <OTHER-SE> 61,089 <TOTAL-LIABILITIES-AND-EQUITY> 1,037,285 <INTEREST-LOAN> 17,258 <INTEREST-INVEST> 2,554 <INTEREST-OTHER> 4 <INTEREST-TOTAL> 19,816 <INTEREST-DEPOSIT> 8,600 <INTEREST-EXPENSE> 10,376 <INTEREST-INCOME-NET> 9,440 <LOAN-LOSSES> 675 <SECURITIES-GAINS> 81 <EXPENSE-OTHER> 7,246 <INCOME-PRETAX> 3,287 <INCOME-PRE-EXTRAORDINARY> 3,287 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 2,110 <EPS-PRIMARY> 0.55 <EPS-DILUTED> 0.54 <YIELD-ACTUAL> 8.13 <LOANS-NON> 3,616 <LOANS-PAST> 238 <LOANS-TROUBLED> 0 <LOANS-PROBLEM> 32,692 <ALLOWANCE-OPEN> 10,401 <CHARGE-OFFS> 258 <RECOVERIES> 164 <ALLOWANCE-CLOSE> 10,982 <ALLOWANCE-DOMESTIC> 10,982 <ALLOWANCE-FOREIGN> 0 <ALLOWANCE-UNALLOCATED> 3,020