<TABLE> <S> <C>

<PAGE>
<ARTICLE> 9
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   YEAR                   YEAR                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1998             DEC-31-1997             DEC-31-1996
<PERIOD-START>                             JAN-01-1998             JAN-01-1997             JAN-01-1996
<PERIOD-END>                               DEC-31-1998             DEC-31-1997             DEC-31-1996
<CASH>                                           5,727                   5,267                       0
<INT-BEARING-DEPOSITS>                               0                       0                       0
<FED-FUNDS-SOLD>                                 7,520                   8,910                       0
<TRADING-ASSETS>                                     0                       0                       0
<INVESTMENTS-HELD-FOR-SALE>                     25,298                  15,558                       0
<INVESTMENTS-CARRYING>                           2,496                   3,995                       0
<INVESTMENTS-MARKET>                             2,525                   4,026                       0
<LOANS>                                         95,140                  84,594                       0
<ALLOWANCE>                                        701                     673                       0
<TOTAL-ASSETS>                                 139,278                 121,850                       0
<DEPOSITS>                                     124,420                 108,107                       0
<SHORT-TERM>                                         0                       0                       0
<LIABILITIES-OTHER>                                800                     760                       0
<LONG-TERM>                                          0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                         1,300                   1,300                       0
<OTHER-SE>                                      12,759                  11,683                       0
<TOTAL-LIABILITIES-AND-EQUITY>                 139,278                 121,850                       0
<INTEREST-LOAN>                                  7,850                   6,789                   5,699
<INTEREST-INVEST>                                1,397                   1,396                   1,135
<INTEREST-OTHER>                                   717                     509                     525
<INTEREST-TOTAL>                                 9,964                   8,694                   7,359
<INTEREST-DEPOSIT>                               4,260                   3,605                   2,980
<INTEREST-EXPENSE>                               4,260                   3,605                   2,988
<INTEREST-INCOME-NET>                            5,704                   5,088                   4,371
<LOAN-LOSSES>                                       90                     107                      40
<SECURITIES-GAINS>                                   0                       5                       0
<EXPENSE-OTHER>                                  3,629                   3,293                   2,965
<INCOME-PRETAX>                                  2,974                   2,951                   2,367
<INCOME-PRE-EXTRAORDINARY>                       2,974                   2,951                   2,367
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                     1,891                   1,894                   1,538
<EPS-PRIMARY>                                     3.96                    4.04                    3.29
<EPS-DILUTED>                                     3.96                    4.04                    3.24
<YIELD-ACTUAL>                                    4.70                    4.60                    4.64
<LOANS-NON>                                        509                     546                     687
<LOANS-PAST>                                     3,310                   1,031                     739
<LOANS-TROUBLED>                                     0                       0                       0
<LOANS-PROBLEM>                                    508                     546                     563
<ALLOWANCE-OPEN>                                   673                     681                     662
<CHARGE-OFFS>                                       65                     116                      25
<RECOVERIES>                                         3                       1                       4
<ALLOWANCE-CLOSE>                                  701                     673                     681
<ALLOWANCE-DOMESTIC>                               701                     673                     681
<ALLOWANCE-FOREIGN>                                  0                       0                       0
<ALLOWANCE-UNALLOCATED>                              0                       0                       0
        

</TABLE>