<TABLE> <S> <C>

<PAGE>
<ARTICLE> 9
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
BALANCE SHEETS OF COWLITZ BANCORPORATION AND SUBSIDIARY AS OF MARCH 31, 1999 ADN
DECEMBER 31, 1998 ADN RELATED CONSOLIDATED STATEMENTS OF INCOME, CHANGES IN
SHAREHOLDERS' EQUITY AND CASH FLOWS FOR EACH OF THE PERIOD ENDED MARCH 31, 1999
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               MAR-31-1999
<CASH>                                          24,688
<INT-BEARING-DEPOSITS>                               0
<FED-FUNDS-SOLD>                                     0
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                      6,031
<INVESTMENTS-CARRYING>                           4,465
<INVESTMENTS-MARKET>                             4,479
<LOANS>                                        128,193
<ALLOWANCE>                                      1,988
<TOTAL-ASSETS>                                 175,518
<DEPOSITS>                                     119,621
<SHORT-TERM>                                     2,475
<LIABILITIES-OTHER>                                876
<LONG-TERM>                                     21,603
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        18,254
<OTHER-SE>                                      12,689
<TOTAL-LIABILITIES-AND-EQUITY>                 175,518
<INTEREST-LOAN>                                  3,585
<INTEREST-INVEST>                                  217
<INTEREST-OTHER>                                   251
<INTEREST-TOTAL>                                 4,053
<INTEREST-DEPOSIT>                               1,020
<INTEREST-EXPENSE>                                 439
<INTEREST-INCOME-NET>                            2,594
<LOAN-LOSSES>                                      634
<SECURITIES-GAINS>                                   0
<EXPENSE-OTHER>                                  2,076
<INCOME-PRETAX>                                    155
<INCOME-PRE-EXTRAORDINARY>                         155
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       102
<EPS-PRIMARY>                                      .03
<EPS-DILUTED>                                      .02
<YIELD-ACTUAL>                                   10.41
<LOANS-NON>                                      2,974
<LOANS-PAST>                                        16
<LOANS-TROUBLED>                                     0
<LOANS-PROBLEM>                                      0
<ALLOWANCE-OPEN>                                 1,814
<CHARGE-OFFS>                                      496
<RECOVERIES>                                        36
<ALLOWANCE-CLOSE>                                1,988
<ALLOWANCE-DOMESTIC>                             1,988
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                              0
        

</TABLE>