<TABLE> <S> <C>
<PAGE>
<ARTICLE> 9
<LEGEND>
This schedule contains summary financial information extracted from the 10Q for
Woronoco Bancorp, Inc. for the three and 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> 3-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<CASH> $15,162
<INT-BEARING-DEPOSITS> 4,374
<FED-FUNDS-SOLD> 0
<TRADING-ASSETS> 0
<INVESTMENTS-HELD-FOR-SALE> 191,345
<INVESTMENTS-CARRYING> 191,345
<INVESTMENTS-MARKET> 191,345
<LOANS> 380,105
<ALLOWANCE> (2,403)
<TOTAL-ASSETS> 610,495
<DEPOSITS> 306,257
<SHORT-TERM> 224,107
<LIABILITIES-OTHER> 8,500
<LONG-TERM> 0
0
0
<COMMON> 60
<OTHER-SE> 71,571
<TOTAL-LIABILITIES-AND-EQUITY> 610,495
<INTEREST-LOAN> 19,566
<INTEREST-INVEST> 9,430
<INTEREST-OTHER> 195
<INTEREST-TOTAL> 29,216
<INTEREST-DEPOSIT> 7,410
<INTEREST-EXPENSE> 16,757
<INTEREST-INCOME-NET> 12,459
<LOAN-LOSSES> 120
<SECURITIES-GAINS> 962
<EXPENSE-OTHER> 10,863
<INCOME-PRETAX> 4,536
<INCOME-PRE-EXTRAORDINARY> 4,536
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 2,989
<EPS-BASIC> 0.64
<EPS-DILUTED> 0.63
<YIELD-ACTUAL> 7.35
<LOANS-NON> 407
<LOANS-PAST> 0
<LOANS-TROUBLED> 0
<LOANS-PROBLEM> 1,978
<ALLOWANCE-OPEN> 2,309
<CHARGE-OFFS> 77
<RECOVERIES> 51
<ALLOWANCE-CLOSE> 2,403
<ALLOWANCE-DOMESTIC> 2,403
<ALLOWANCE-FOREIGN> 0
<ALLOWANCE-UNALLOCATED> 0
</TABLE>