<ARTICLE>                                            9
<LEGEND>
The schedule  contains summary financial  information  extracted from Firstbank
Corporation's  unaudited  financial  statements and is qualified in its entirety
by reference to such financial statements as of September 30, 2000.

<MULTIPLIER>                                   1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                              DEC-31-2000
<PERIOD-END>                                   SEP-30-2000
<CASH>                                          22,704
<INT-BEARING-DEPOSITS>                             306
<FED-FUNDS-SOLD>                                 4,980
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                     77,294
<INVESTMENTS-CARRYING>                               0
<INVESTMENTS-MARKET>                                 0
<LOANS>                                        578,906
<ALLOWANCE>                                     (9,943)
<TOTAL-ASSETS>                                 712,102
<DEPOSITS>                                     529,964
<SHORT-TERM>                                    36,654
<LIABILITIES-OTHER>                              9,588
<LONG-TERM>                                     72,536
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        53,249
<OTHER-SE>                                      10,111
<TOTAL-LIABILITIES-AND-EQUITY>                 712,102
<INTEREST-LOAN>                                 35,939
<INTEREST-INVEST>                                3,907
<INTEREST-OTHER>                                     0
<INTEREST-TOTAL>                                39,846
<INTEREST-DEPOSIT>                              13,851
<INTEREST-EXPENSE>                              18,455
<INTEREST-INCOME-NET>                           21,391
<LOAN-LOSSES>                                      562
<SECURITIES-GAINS>                                   1
<EXPENSE-OTHER>                                 15,574
<INCOME-PRETAX>                                  9,301
<INCOME-PRE-EXTRAORDINARY>                       9,301
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     6,392
<EPS-BASIC>                                       1.37
<EPS-DILUTED>                                     1.35
<YIELD-ACTUAL>                                    4.66
<LOANS-NON>                                      1,513
<LOANS-PAST>                                       723
<LOANS-TROUBLED>                                    53
<LOANS-PROBLEM>                                  2,367
<ALLOWANCE-OPEN>                                 9,317
<CHARGE-OFFS>                                      462
<RECOVERIES>                                       526
<ALLOWANCE-CLOSE>                                9,943
<ALLOWANCE-DOMESTIC>                             8,262
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                          1,681