<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
THREE-MONTH PERIOD FROM JANUARY 1, 2000 THROUGH MARCH 31, 2000 AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>

<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               MAR-31-2000
<CASH>                                       3,235,738
<INT-BEARING-DEPOSITS>                         148,451
<FED-FUNDS-SOLD>                             4,040,000
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                          0
<INVESTMENTS-CARRYING>                      10,852,161
<INVESTMENTS-MARKET>                        10,505,926
<LOANS>                                     42,535,665
<ALLOWANCE>                                    580,446
<TOTAL-ASSETS>                              63,329,600
<DEPOSITS>                                  54,983,551
<SHORT-TERM>                                         0
<LIABILITIES-OTHER>                            172,487
<LONG-TERM>                                  2,500,000
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       676,188
<OTHER-SE>                                   4,997,374
<TOTAL-LIABILITIES-AND-EQUITY>              63,329,600
<INTEREST-LOAN>                              1,004,869
<INTEREST-INVEST>                              160,467
<INTEREST-OTHER>                                53,921
<INTEREST-TOTAL>                             1,219,257
<INTEREST-DEPOSIT>                             502,190
<INTEREST-EXPENSE>                             537,214
<INTEREST-INCOME-NET>                          682,043
<LOAN-LOSSES>                                   31,962
<SECURITIES-GAINS>                                   0
<EXPENSE-OTHER>                                513,193
<INCOME-PRETAX>                                249,418
<INCOME-PRE-EXTRAORDINARY>                     249,418
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   249,418
<EPS-BASIC>                                        .37
<EPS-DILUTED>                                      .33
<YIELD-ACTUAL>                                    4.75
<LOANS-NON>                                          0
<LOANS-PAST>                                    12,932
<LOANS-TROUBLED>                               450,000
<LOANS-PROBLEM>                                 77,000
<ALLOWANCE-OPEN>                               531,024
<CHARGE-OFFS>                                        0
<RECOVERIES>                                    17,461
<ALLOWANCE-CLOSE>                                    0
<ALLOWANCE-DOMESTIC>                                 0
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                        580,446


</TABLE>