<TABLE> <S> <C>

<PAGE>
<ARTICLE> 9
<LEGEND>
THE SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
BALANCE SHEETS OF COWLITZ BANCORPORATION AND SUBSIDIARIES AS OF SEPT. 30, 2000
AND DEC. 31, 1999 AND RELATED CONSOLIDATED STATEMENTS OF INCOME, CHANGES IN
SHAREHOLDERS' EQUITY AND CASH FLOWS FOR EACH OF THE PERIOD ENDED SEPT. 30, 2000
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>

<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               SEP-30-2000
<CASH>                                          26,051
<INT-BEARING-DEPOSITS>                               0
<FED-FUNDS-SOLD>                                     0
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                      7,986
<INVESTMENTS-CARRYING>                           4,570
<INVESTMENTS-MARKET>                             4,563
<LOANS>                                        232,028
<ALLOWANCE>                                      4,772
<TOTAL-ASSETS>                                 296,900
<DEPOSITS>                                     244,076
<SHORT-TERM>                                     1,200
<LIABILITIES-OTHER>                              2,630
<LONG-TERM>                                     18,394
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        17,467
<OTHER-SE>                                      13,133
<TOTAL-LIABILITIES-AND-EQUITY>                 296,900
<INTEREST-LOAN>                                 17,232
<INTEREST-INVEST>                                  636
<INTEREST-OTHER>                                   467
<INTEREST-TOTAL>                                18,335
<INTEREST-DEPOSIT>                               5,545
<INTEREST-EXPENSE>                               1,259
<INTEREST-INCOME-NET>                           11,531
<LOAN-LOSSES>                                      955
<SECURITIES-GAINS>                                   7
<EXPENSE-OTHER>                                 12,205
<INCOME-PRETAX>                                    606
<INCOME-PRE-EXTRAORDINARY>                         606
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       364
<EPS-BASIC>                                        .09
<EPS-DILUTED>                                      .09
<YIELD-ACTUAL>                                   11.06
<LOANS-NON>                                      7,237
<LOANS-PAST>                                       439
<LOANS-TROUBLED>                                     0
<LOANS-PROBLEM>                                      0
<ALLOWANCE-OPEN>                                 2,281
<CHARGE-OFFS>                                      653
<RECOVERIES>                                       201
<ALLOWANCE-CLOSE>                                4,772
<ALLOWANCE-DOMESTIC>                             4,772
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                              0


</TABLE>