<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
NINE-MONTH PERIOD FROM JANUARY 1, 2000 THROUGH SEPTEMBER 30, 2000 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<CASH> 5,244,580
<INT-BEARING-DEPOSITS> 166,345
<FED-FUNDS-SOLD> 200,000
<TRADING-ASSETS> 0
<INVESTMENTS-HELD-FOR-SALE> 10,295,469
<INVESTMENTS-CARRYING> 10,295,469
<INVESTMENTS-MARKET> 10,295,469
<LOANS> 47,487,176
<ALLOWANCE> (699,086)
<TOTAL-ASSETS> 66,714,913
<DEPOSITS> 57,732,866
<SHORT-TERM> 0
<LIABILITIES-OTHER> 129,299
<LONG-TERM> 2,500,000
0
0
<COMMON> 676,188
<OTHER-SE> 5,604,750
<TOTAL-LIABILITIES-AND-EQUITY> 66,714,913
<INTEREST-LOAN> 3,242,006
<INTEREST-INVEST> 488,943
<INTEREST-OTHER> 216,317
<INTEREST-TOTAL> 3,947,266
<INTEREST-DEPOSIT> 1,651,047
<INTEREST-EXPENSE> 120,816
<INTEREST-INCOME-NET> 2,175,403
<LOAN-LOSSES> 196,787
<SECURITIES-GAINS> 0
<EXPENSE-OTHER> 160,500
<INCOME-PRETAX> 726,834
<INCOME-PRE-EXTRAORDINARY> 726,834
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 726,83
<EPS-BASIC> 1.07
<EPS-DILUTED> 0.96
<YIELD-ACTUAL> 5.80
<LOANS-NON> 0
<LOANS-PAST> 16,003
<LOANS-TROUBLED> 0
<LOANS-PROBLEM> 16,003
<ALLOWANCE-OPEN> 658,421
<CHARGE-OFFS> 36,829
<RECOVERIES> 0
<ALLOWANCE-CLOSE> 699,086
<ALLOWANCE-DOMESTIC> 699,086
<ALLOWANCE-FOREIGN> 0
<ALLOWANCE-UNALLOCATED> 652,073
</TABLE>