<ARTICLE>                                            9
<LEGEND>
This  schedule  contains  summary  financial   information  extracted  from  the
financial  statements  of Firstbank  Corporation  contained in its Form 10-K and
Annual Report to  Shareholders  for the period ended  December 31, 1999,  and is
qualified in its entirety by reference to such financial statements.
</LEGEND>

                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                              DEC-31-1999
<PERIOD-START>                                 JAN-01-1999
<PERIOD-END>                                   DEC-31-1999
<CASH>                                          24,786
<INT-BEARING-DEPOSITS>                             411
<FED-FUNDS-SOLD>                                    89
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                     90,266
<INVESTMENTS-CARRYING>                               0
<INVESTMENTS-MARKET>                                 0
<LOANS>                                        508,238
<ALLOWANCE>                                      9,317
<TOTAL-ASSETS>                                 650,552
<DEPOSITS>                                     491,404
<SHORT-TERM>                                    51,819
<LIABILITIES-OTHER>                              7,913
<LONG-TERM>                                     38,384
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        55,263
<OTHER-SE>                                       5,769
<TOTAL-LIABILITIES-AND-EQUITY>                 650,552
<INTEREST-LOAN>                                 40,451
<INTEREST-INVEST>                                5,348
<INTEREST-OTHER>                                   263
<INTEREST-TOTAL>                                46,062
<INTEREST-DEPOSIT>                              16,923
<INTEREST-EXPENSE>                              19,283
<INTEREST-INCOME-NET>                           26,779
<LOAN-LOSSES>                                      514
<SECURITIES-GAINS>                                  (1)
<EXPENSE-OTHER>                                 20,067
<INCOME-PRETAX>                                 11,566
<INCOME-PRE-EXTRAORDINARY>                      11,566
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     8,036
<EPS-BASIC>                                     1.70
<EPS-DILUTED>                                     1.66
<YIELD-ACTUAL>                                    8.21
<LOANS-NON>                                      2,240
<LOANS-PAST>                                       663
<LOANS-TROUBLED>                                    55
<LOANS-PROBLEM>                                  4,169
<ALLOWANCE-OPEN>                                 9,048
<CHARGE-OFFS>                                      799
<RECOVERIES>                                       554
<ALLOWANCE-CLOSE>                                9,317
<ALLOWANCE-DOMESTIC>                             7,404
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                          1,913