<TABLE> <S> <C>
<PAGE>
<ARTICLE> 9
<LEGEND>
THIS SCHEDULE CONTAINS FINANCIAL INFORMATION EXTRACTED FROM THE CONSOLIDATED
FINANCIAL STATEMENTS OF PACIFIC NORTHWEST BANCORP AS OF AND FOR THE NINE MONTHS
ENDED SEPTEMBER 30, 2000, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<CASH> 83,249
<INT-BEARING-DEPOSITS> 1,841
<FED-FUNDS-SOLD> 1,100
<TRADING-ASSETS> 0
<INVESTMENTS-HELD-FOR-SALE> 858,432
<INVESTMENTS-CARRYING> 66,187
<INVESTMENTS-MARKET> 64,119
<LOANS> 1,717,618
<ALLOWANCE> 16,593
<TOTAL-ASSETS> 2,839,934
<DEPOSITS> 1,678,879
<SHORT-TERM> 525,689
<LIABILITIES-OTHER> 43,607
<LONG-TERM> 425,483
0
0
<COMMON> 26,188
<OTHER-SE> 140,088
<TOTAL-LIABILITIES-AND-EQUITY> 2,839,934
<INTEREST-LOAN> 120,034
<INTEREST-INVEST> 41,225
<INTEREST-OTHER> 1,246
<INTEREST-TOTAL> 162,505
<INTEREST-DEPOSIT> 45,532
<INTEREST-EXPENSE> 94,317
<INTEREST-INCOME-NET> 68,188
<LOAN-LOSSES> 3,350
<SECURITIES-GAINS> (6,770)
<EXPENSE-OTHER> 66,379
<INCOME-PRETAX> 5,406
<INCOME-PRE-EXTRAORDINARY> 2,955
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 2,955
<EPS-BASIC> 0.19
<EPS-DILUTED> 0.19
<YIELD-ACTUAL> 3.49
<LOANS-NON> 12,936
<LOANS-PAST> 0
<LOANS-TROUBLED> 0
<LOANS-PROBLEM> 0
<ALLOWANCE-OPEN> 15,182
<CHARGE-OFFS> 2,312
<RECOVERIES> 373
<ALLOWANCE-CLOSE> 16,593
<ALLOWANCE-DOMESTIC> 11,265
<ALLOWANCE-FOREIGN> 0
<ALLOWANCE-UNALLOCATED> 5,328
</TABLE>