<ARTICLE> 9
<LEGEND>
This schedule contains summary financial information extracted from the
unaudited financial statements of SIS Bancorp, Inc. at and for the periods ended
June 30, 1996, September 30, 1996, March 31, 1997, June 30, 1997 and September
30, 1997 and is qualified in its entirety by reference to such financial
statements.
</LEGEND>
<RESTATED>
<PERIOD-TYPE> 6-MOS 9-MOS 3-MOS 6-MOS 9-MOS
<FISCAL-YEAR-END> DEC-31-1996 DEC-31-1996 DEC-31-1997 DEC-31-1997 DEC-31-1997
<PERIOD-START> JAN-01-1996 JAN-01-1996 JAN-01-1997 JAN-01-1997 JAN-01-1997
<PERIOD-END> JUN-30-1996 SEP-30-1996 MAR-31-1997 JUN-30-1997 SEP-30-1997
<CASH> 43,533 44,469 52,612 54,058 45,023
<INT-BEARING-DEPOSITS> 309 7,045 45 45 0
<FED-FUNDS-SOLD> 11,500 14,896 18,000 5,000 7,700
<TRADING-ASSETS> 404 415 468 549 562
<INVESTMENTS-HELD-FOR-SALE> 377,526 424,162 534,460 550,264 560,207
<INVESTMENTS-CARRYING> 223,748 223,950 216,463 211,735 207,237
<INVESTMENTS-MARKET> 222,838 223,374 213,409 210,983 209,096
<LOANS> 738,628 756,665 782,480 818,659 849,391
<ALLOWANCE> 18,918 19,281 20,337 20,434 22,484
<TOTAL-ASSETS> 1,446,147 1,527,790 1,655,648 1,695,249 1,725,081
<DEPOSITS> 1,121,260 1,157,507 1,214,595 1,231,296 1,251,684
<SHORT-TERM> 190,893 221,333 284,504 301,792 303,715
<LIABILITIES-OTHER> 28,313 32,646 35,424 38,255 41,365
<LONG-TERM> 3,026 3,026 2,848 2,670 2,670
<PREFERRED-MANDATORY> 0 0 0 0 0
<PREFERRED> 0 0 0 0 0
<COMMON> 71 71 71 71 71
<OTHER-SE> 102,584 113,207 118,206 121,165 125,576
<TOTAL-LIABILITIES-AND-EQUITY> 1,446,147 1,527,790 1,655,648 1,695,249 1,725,081
<INTEREST-LOAN> 29,760 45,419 16,249 32,942 50,368
<INTEREST-INVEST> 17,662 27,982 12,279 25,155 37,591
<INTEREST-OTHER> 307 484 295 429 805
<INTEREST-TOTAL> 47,729 73,889 28,826 58,531 88,772
<INTEREST-DEPOSIT> 19,133 29,018 10,056 20,350 30,969
<INTEREST-EXPENSE> 22,918 35,443 13,912 28,554 43,769
<INTEREST-INCOME-NET> 24,811 38,446 14,914 29,977 45,003
<LOAN-LOSSES> 1,847 2,751 500 965 1,431
<SECURITIES-GAINS> 4 74 (11) 79 120
<EXPENSE-OTHER> 22,904 34,922 12,435 24,742 37,366
<INCOME-PRETAX> 7,018 11,514 5,371 11,535 17,692
<INCOME-PRE-EXTRAORDINARY> 6,528 17,445 3,280 6,995 10,825
<EXTRAORDINARY> 0 0 0 0 0
<CHANGES> 0 0 0 0 0
<NET-INCOME> 6,528 17,445 3,280 6,995 10,825
<EPS-PRIMARY> 1.00 2.66 0.50 1.06 1.65
<EPS-DILUTED> 0.97 2.57 0.48 1.01 1.56
<YIELD-ACTUAL> 7.54 7.58 7.61 7.61 7.60
<LOANS-NON> 11,228 6,958 6,055 7,040 6,112
<LOANS-PAST> 299 1,183 1,315 726 129
<LOANS-TROUBLED> 1,588 1,582 889 1,167 1,163
<LOANS-PROBLEM> 32,500 32,500 0 0 27,543
<ALLOWANCE-OPEN> 18,612 18,612 19,549 19,549 19,549
<CHARGE-OFFS> 3,120 4,115 222 840 1,768
<RECOVERIES> 1,579 2,033 510 760 3,272
<ALLOWANCE-CLOSE> 18,918 19,281 20,337 20,434 22,484
<ALLOWANCE-DOMESTIC> 18,918 19,281 20,337 20,434 22,484
<ALLOWANCE-FOREIGN> 0 0 0 0 0
<ALLOWANCE-UNALLOCATED> 0 0 0 0 0