<ARTICLE> 9
<LEGEND>
FINANCIAL DATA SCHEDULE
Columbia Banking System, Inc. (in thousands except per share)

<MULTIPLIER> 1000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               SEP-30-2000
<CASH>                                           73707
<INT-BEARING-DEPOSITS>                           33039
<FED-FUNDS-SOLD>                                     0
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                      81433
<INVESTMENTS-CARRYING>                            7750
<INVESTMENTS-MARKET>                                 0
<LOANS>                                        1181691
<ALLOWANCE>                                      12569
<TOTAL-ASSETS>                                 1439498
<DEPOSITS>                                     1271438
<SHORT-TERM>                                     40000
<LIABILITIES-OTHER>                              10382
<LONG-TERM>                                       6500
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         91731
<OTHER-SE>                                       19447
<TOTAL-LIABILITIES-AND-EQUITY>                 1439498
<INTEREST-LOAN>                                  75628
<INTEREST-INVEST>                                 4369
<INTEREST-OTHER>                                   174
<INTEREST-TOTAL>                                 80171
<INTEREST-DEPOSIT>                               33759
<INTEREST-EXPENSE>                               37015
<INTEREST-INCOME-NET>                            43156
<LOAN-LOSSES>                                     2700
<SECURITIES-GAINS>                                   0
<EXPENSE-OTHER>                                  33412
<INCOME-PRETAX>                                  15562
<INCOME-PRE-EXTRAORDINARY>                       15562
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     10206
<EPS-BASIC>                                        .88
<EPS-DILUTED>                                      .85
<YIELD-ACTUAL>                                    4.69
<LOANS-NON>                                       4458
<LOANS-PAST>                                         0
<LOANS-TROUBLED>                                  1148
<LOANS-PROBLEM>                                      0
<ALLOWANCE-OPEN>                                  9967
<CHARGE-OFFS>                                      839
<RECOVERIES>                                       741
<ALLOWANCE-CLOSE>                                12569
<ALLOWANCE-DOMESTIC>                             12569
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                              0