<TABLE> <S> <C>

<PAGE>
<ARTICLE> 9
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED FINANCIAL STATEMENTS OF ROCKDALE NATIONAL BANCSHARES, INC. FOR THE
SIX MONTH PERIOD FROM JANUARY 1, 1999 THROUGH SEPTEMBER 30, 1999 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>

<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               SEP-30-1999
<CASH>                                       6,590,949
<INT-BEARING-DEPOSITS>                       2,206,277
<FED-FUNDS-SOLD>                             1,580,000
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                          0
<INVESTMENTS-CARRYING>                               0
<INVESTMENTS-MARKET>                        10,958,203
<LOANS>                                     35,834,269
<ALLOWANCE>                                  (460,086)
<TOTAL-ASSETS>                              56,710,072
<DEPOSITS>                                  48,856,302
<SHORT-TERM>                                         0
<LIABILITIES-OTHER>                            144,589
<LONG-TERM>                                  2,500,000
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       676,188
<OTHER-SE>                                   4,802,993
<TOTAL-LIABILITIES-AND-EQUITY>              56,710,072
<INTEREST-LOAN>                              1,789,025
<INTEREST-INVEST>                              456,817
<INTEREST-OTHER>                                94,845
<INTEREST-TOTAL>                             2,350,233
<INTEREST-DEPOSIT>                             911,741
<INTEREST-EXPENSE>                             926,220
<INTEREST-INCOME-NET>                        1,424,013
<LOAN-LOSSES>                                  290,504
<SECURITIES-GAINS>                               2,046
<EXPENSE-OTHER>                              1,392,942
<INCOME-PRETAX>                               (34,001)
<INCOME-PRE-EXTRAORDINARY>                    (34,001)
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (34,001)
<EPS-BASIC>                                     (0.05)
<EPS-DILUTED>                                   (0.05)
<YIELD-ACTUAL>                                    5.27
<LOANS-NON>                                          0
<LOANS-PAST>                                   221,173
<LOANS-TROUBLED>                               108,170
<LOANS-PROBLEM>                                      0
<ALLOWANCE-OPEN>                             (194,581)
<CHARGE-OFFS>                                   25,000
<RECOVERIES>                                         0
<ALLOWANCE-CLOSE>                                    0
<ALLOWANCE-DOMESTIC>                                 0
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                      (460,086)


</TABLE>