<TABLE> <S> <C>
<PAGE>
<ARTICLE> 9
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
STATEMENT OF CONDITION, THE CONSOLIDATED STATEMENT OF EARNINGS, THE CONSOLIDATED
STATEMENT OF CASH FLOWS OF ITEM 1 OF PART I AND TABLES 2, 6, 7, AND 8 OF ITEM 2
OF PART I OF THE AMSOUTH BANCORPORATION FORM 10-Q FOR THE NINE MONTHS ENDED
SEPTEMBER 30, 2000.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
<S> <C> <C>
<PERIOD-TYPE> 9-MOS 9-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-1999
<PERIOD-START> JAN-01-2000 JAN-01-1999
<PERIOD-END> SEP-30-2000 SEP-30-1999
<CASH> 1,182,521 1,493,199
<INT-BEARING-DEPOSITS> 0 0
<FED-FUNDS-SOLD> 205,465 185,705
<TRADING-ASSETS> 13,079 75,728
<INVESTMENTS-HELD-FOR-SALE> 1,939,431 8,197,989
<INVESTMENTS-CARRYING> 6,754,735 4,703,929
<INVESTMENTS-MARKET> 6,620,957 4,597,159
<LOANS> 24,481,792 26,255,232
<ALLOWANCE> 377,344 365,427
<TOTAL-ASSETS> 39,395,701 43,425,019
<DEPOSITS> 26,790,431 27,399,600
<SHORT-TERM> 3,087,233 5,966,118
<LIABILITIES-OTHER> 761,610 611,732
<LONG-TERM> 5,994,741 6,272,512
0 0
0 0
<COMMON> 416,949 417,804
<OTHER-SE> 2,344,737 2,757,253
<TOTAL-LIABILITIES-AND-EQUITY> 39,395,701 43,425,019
<INTEREST-LOAN> 1,699,559 1,565,671
<INTEREST-INVEST> 638,098 572,975
<INTEREST-OTHER> 12,672 18,763
<INTEREST-TOTAL> 2,350,329 2,157,409
<INTEREST-DEPOSIT> 776,490 663,327
<INTEREST-EXPENSE> 1,291,342 1,030,724
<INTEREST-INCOME-NET> 1,058,987 1,126,685
<LOAN-LOSSES> 172,000 67,927
<SECURITIES-GAINS> (98,280) 5,688
<EXPENSE-OTHER> 1,082,151 1,068,092
<INCOME-PRETAX> 274,824 622,414
<INCOME-PRE-EXTRAORDINARY> 274,824 622,414
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> 202,568 403,022
<EPS-BASIC> 0.53 1.03
<EPS-DILUTED> 0.52 1.02
<YIELD-ACTUAL> 3.66 4.08
<LOANS-NON> 146,069 161,843
<LOANS-PAST> 78,314 44,644
<LOANS-TROUBLED> 0 0
<LOANS-PROBLEM> 0 0
<ALLOWANCE-OPEN> 363,476 373,756
<CHARGE-OFFS> 123,167 108,929
<RECOVERIES> 39,626 32,673
<ALLOWANCE-CLOSE> 377,344 365,427
<ALLOWANCE-DOMESTIC> 377,344 365,427
<ALLOWANCE-FOREIGN> 0 0
<ALLOWANCE-UNALLOCATED> 0 0
</TABLE>