<ARTICLE>                                            9
<LEGEND>
The schedule contains summary financial information extracted from Firstbank
Corporation's financial statements and is qualified in its entirety by reference
to such financial statements as of June 30, 1999. (Dollars in thousands)
</LEGEND>
<MULTIPLIER>                                   1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                              DEC-31-1998
<PERIOD-START>                                 JAN-01-1999
<PERIOD-END>                                   JUN-30-1999
<CASH>                                          19,523
<INT-BEARING-DEPOSITS>                             434
<FED-FUNDS-SOLD>                                   360
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                     90,909
<INVESTMENTS-CARRYING>                               0
<INVESTMENTS-MARKET>                                 0
<LOANS>                                        461,435
<ALLOWANCE>                                     (9,221)
<TOTAL-ASSETS>                                 598,067
<DEPOSITS>                                     485,144
<SHORT-TERM>                                    13,125
<LIABILITIES-OTHER>                              7,927
<LONG-TERM>                                     14,168
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        51,420
<OTHER-SE>                                       8,179
<TOTAL-LIABILITIES-AND-EQUITY>                 598,607
<INTEREST-LOAN>                                 19,423
<INTEREST-INVEST>                                2,899
<INTEREST-OTHER>                                     0
<INTEREST-TOTAL>                                22,322
<INTEREST-DEPOSIT>                               8,539
<INTEREST-EXPENSE>                               9,441
<INTEREST-INCOME-NET>                           12,881
<LOAN-LOSSES>                                      252
<SECURITIES-GAINS>                                  21
<EXPENSE-OTHER>                                  9,745
<INCOME-PRETAX>                                  5,611
<INCOME-PRE-EXTRAORDINARY>                       5,611
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     3,916
<EPS-BASIC>                                     0.87
<EPS-DILUTED>                                     0.84
<YIELD-ACTUAL>                                    4.84
<LOANS-NON>                                      1,479
<LOANS-PAST>                                       419
<LOANS-TROUBLED>                                    74
<LOANS-PROBLEM>                                    702
<ALLOWANCE-OPEN>                                 9,048
<CHARGE-OFFS>                                      441
<RECOVERIES>                                       362
<ALLOWANCE-CLOSE>                                9,221
<ALLOWANCE-DOMESTIC>                             7,522
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                          1,699