
<TABLE> <S> <C>

<ARTICLE> 9
<LEGEND>
FINANCIAL DATA SCHEDULE
Columbia Banking System, Inc.
(in thousands except per share)
</LEGEND>
<CIK> 0000887343
<NAME> COLUMBIA BANKING SYSTEM, INC.
<MULTIPLIER> 1000
<CURRENCY> $

<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               MAR-31-2000
<EXCHANGE-RATE>                                      1
<CASH>                                           61045
<INT-BEARING-DEPOSITS>                            1114
<FED-FUNDS-SOLD>                                     0
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                      88794
<INVESTMENTS-CARRYING>                            7094
<INVESTMENTS-MARKET>                                 0
<LOANS>                                        1109244
<ALLOWANCE>                                      10897
<TOTAL-ASSETS>                                 1320186
<DEPOSITS>                                     1186142
<SHORT-TERM>                                     14400
<LIABILITIES-OTHER>                              10814
<LONG-TERM>                                       6500
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         78457
<OTHER-SE>                                       23873
<TOTAL-LIABILITIES-AND-EQUITY>                 1320186
<INTEREST-LOAN>                                  23343
<INTEREST-INVEST>                                 1453
<INTEREST-OTHER>                                    17
<INTEREST-TOTAL>                                 24813
<INTEREST-DEPOSIT>                               10009
<INTEREST-EXPENSE>                               10959
<INTEREST-INCOME-NET>                            13854
<LOAN-LOSSES>                                      900
<SECURITIES-GAINS>                                   0
<EXPENSE-OTHER>                                  10823
<INCOME-PRETAX>                                   4724
<INCOME-PRE-EXTRAORDINARY>                        4724
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                      3096
<EPS-BASIC>                                      .27
<EPS-DILUTED>                                      .26
<YIELD-ACTUAL>                                    4.75
<LOANS-NON>                                       5221
<LOANS-PAST>                                         0
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<LOANS-PROBLEM>                                      0
<ALLOWANCE-OPEN>                                  9967
<CHARGE-OFFS>                                      246
<RECOVERIES>                                       276
<ALLOWANCE-CLOSE>                                10897
<ALLOWANCE-DOMESTIC>                             10897
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                            682


</TABLE>
