<TABLE> <S> <C>
<PAGE>
<ARTICLE> 9
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
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 SIX MONTHS
ENDED JUNE 30, 2000 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
<S> <C> <C>
<PERIOD-TYPE> 6-MOS 6-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-1999
<PERIOD-START> JAN-01-2000 JAN-01-1999
<PERIOD-END> JUN-30-2000 JUN-30-1999
<CASH> 1,538,506 1,528,722
<INT-BEARING-DEPOSITS> 0 0
<FED-FUNDS-SOLD> 87,351 83,852
<TRADING-ASSETS> 34,090 61,904
<INVESTMENTS-HELD-FOR-SALE> 5,935,980 7,717,810
<INVESTMENTS-CARRYING> 6,932,616 4,790,084
<INVESTMENTS-MARKET> 6,726,831 4,705,424
<LOANS> 25,589,410 25,364,303
<ALLOWANCE> 358,064 365,869
<TOTAL-ASSETS> 42,584,032 42,103,322
<DEPOSITS> 27,898,918 27,542,406
<SHORT-TERM> 5,290,643 5,276,814
<LIABILITIES-OTHER> 687,053 591,416
<LONG-TERM> 5,886,467 5,500,565
0 0
0 0
<COMMON> 416,949 421,124
<OTHER-SE> 2,404,002 2,770,997
<TOTAL-LIABILITIES-AND-EQUITY> 42,584,032 42,103,322
<INTEREST-LOAN> 1,129,647 1,026,292
<INTEREST-INVEST> 429,551 368,552
<INTEREST-OTHER> 8,461 13,556
<INTEREST-TOTAL> 1,567,659 1,408,400
<INTEREST-DEPOSIT> 502,788 437,647
<INTEREST-EXPENSE> 846,450 662,062
<INTEREST-INCOME-NET> 721,209 746,338
<LOAN-LOSSES> 48,200 37,323
<SECURITIES-GAINS> 6,473 11,059
<EXPENSE-OTHER> 765,531 707,739
<INCOME-PRETAX> 346,940 416,646
<INCOME-PRE-EXTRAORDINARY> 346,940 416,646
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> 238,834 268,377
<EPS-BASIC> .61 .68
<EPS-DILUTED> .61 .67
<YIELD-ACTUAL> 3.70 4.15
<LOANS-NON> 119,082 124,123
<LOANS-PAST> 70,800 65,324
<LOANS-TROUBLED> 0 0
<LOANS-PROBLEM> 0 0
<ALLOWANCE-OPEN> 363,476 373,756
<CHARGE-OFFS> 74,848 67,727
<RECOVERIES> 26,736 22,517
<ALLOWANCE-CLOSE> 358,064 365,869
<ALLOWANCE-DOMESTIC> 0 0
<ALLOWANCE-FOREIGN> 0 0
<ALLOWANCE-UNALLOCATED> 0 0
</TABLE>