<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> $ <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> JUN-30-1997 <EXCHANGE-RATE> 1 <CASH> 30111 <INT-BEARING-DEPOSITS> 10724 <FED-FUNDS-SOLD> 0 <TRADING-ASSETS> 0 <INVESTMENTS-HELD-FOR-SALE> 47435 <INVESTMENTS-CARRYING> 0 <INVESTMENTS-MARKET> 0 <LOANS> 541388 <ALLOWANCE> 5614 <TOTAL-ASSETS> 655060 <DEPOSITS> 549923 <SHORT-TERM> 0 <LIABILITIES-OTHER> 5874 <LONG-TERM> 37000 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 60832 <OTHER-SE> 1431 <TOTAL-LIABILITIES-AND-EQUITY> 655060 <INTEREST-LOAN> 21965 <INTEREST-INVEST> 1454 <INTEREST-OTHER> 609 <INTEREST-TOTAL> 24028 <INTEREST-DEPOSIT> 9676 <INTEREST-EXPENSE> 10504 <INTEREST-INCOME-NET> 13524 <LOAN-LOSSES> 1606 <SECURITIES-GAINS> 0 <EXPENSE-OTHER> 12163 <INCOME-PRETAX> 4080 <INCOME-PRE-EXTRAORDINARY> 2886 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 2886 <EPS-PRIMARY> .51 <EPS-DILUTED> .51 <YIELD-ACTUAL> 4.83 <LOANS-NON> 1154 <LOANS-PAST> 0 <LOANS-TROUBLED> 23 <LOANS-PROBLEM> 0 <ALLOWANCE-OPEN> 4504 <CHARGE-OFFS> 556 <RECOVERIES> 60 <ALLOWANCE-CLOSE> 5614 <ALLOWANCE-DOMESTIC> 5614 <ALLOWANCE-FOREIGN> 0 <ALLOWANCE-UNALLOCATED> 283