<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 June 30, 1999
and December 31, 1998 and related Consolidated Statements of Income, Changes in
Shareholders' Equity and Cash Flows for each of the period ended June 30, 1999
and is qualified in its entirety by reference to such financial statements.
</LEGEND>

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               JUN-30-1999
<CASH>                                          18,697
<INT-BEARING-DEPOSITS>                               0
<FED-FUNDS-SOLD>                                     0
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                      8,473
<INVESTMENTS-CARRYING>                           4,564
<INVESTMENTS-MARKET>                             4,567
<LOANS>                                        125,488
<ALLOWANCE>                                      1,906
<TOTAL-ASSETS>                                 168,881
<DEPOSITS>                                     114,590
<SHORT-TERM>                                       850
<LIABILITIES-OTHER>                                878
<LONG-TERM>                                     21,400
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        18,265
<OTHER-SE>                                      12,898
<TOTAL-LIABILITIES-AND-EQUITY>                 168,881
<INTEREST-LOAN>                                  6,917
<INTEREST-INVEST>                                  434
<INTEREST-OTHER>                                   508
<INTEREST-TOTAL>                                 7,859
<INTEREST-DEPOSIT>                               1,997
<INTEREST-EXPENSE>                                 807
<INTEREST-INCOME-NET>                            5,055
<LOAN-LOSSES>                                      830
<SECURITIES-GAINS>                                   0
<EXPENSE-OTHER>                                  4,211
<INCOME-PRETAX>                                    670
<INCOME-PRE-EXTRAORDINARY>                         670
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       417
<EPS-BASIC>                                        .10
<EPS-DILUTED>                                      .10
<YIELD-ACTUAL>                                   10.16
<LOANS-NON>                                      3,430
<LOANS-PAST>                                        22
<LOANS-TROUBLED>                                     0
<LOANS-PROBLEM>                                      0
<ALLOWANCE-OPEN>                                 1,814
<CHARGE-OFFS>                                      813
<RECOVERIES>                                        75
<ALLOWANCE-CLOSE>                                1,906
<ALLOWANCE-DOMESTIC>                             1,906
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                              0


</TABLE>