WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> UT
<LEGEND>
Exhibit 27
AMEREN CORPORATION
10-Q JUNE 30, 2000
FINANCIAL DATA SCHEDULE UT
PUBLIC UTILITY COMPANIES AND PUBLIC UTILITY HOLDING COMPANIES
APPENDIX E TO ITEM 601 (C) OF REGULATION S-K
(Thousands of Dollars Except Per Share Amounts)
</LEGEND>
Value
----------------
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> JUN-30-2000
<BOOK-VALUE> PER-BOOK
<TOTAL-NET-UTILITY-PLANT> 7,426,793
<OTHER-PROPERTY-AND-INVEST> 259,449
<TOTAL-CURRENT-ASSETS> 779,565
<TOTAL-DEFERRED-CHARGES> 83,351
<OTHER-ASSETS> 763,305
<TOTAL-ASSETS> 9,312,463
<COMMON> 1,372
<CAPITAL-SURPLUS-PAID-IN> 1,582,501
<RETAINED-EARNINGS> 1,506,290
<TOTAL-COMMON-STOCKHOLDERS-EQ> 3,090,163
0
235,197
<LONG-TERM-DEBT-NET> 2,394,325
<SHORT-TERM-NOTES> 336,053
<LONG-TERM-NOTES-PAYABLE> 0
<COMMERCIAL-PAPER-OBLIGATIONS> 0
<LONG-TERM-DEBT-CURRENT-PORT> 44,444
0
<CAPITAL-LEASE-OBLIGATIONS> 105,675
<LEASES-CURRENT> 12,782
<OTHER-ITEMS-CAPITAL-AND-LIAB> 3,093,824
<TOT-CAPITALIZATION-AND-LIAB> 9,312,463
<GROSS-OPERATING-REVENUE> 1,765,680
<INCOME-TAX-EXPENSE> 123,490
<OTHER-OPERATING-EXPENSES> 1,374,406
<TOTAL-OPERATING-EXPENSES> 1,497,896
<OPERATING-INCOME-LOSS> 267,784
<OTHER-INCOME-NET> (5,171)
<INCOME-BEFORE-INTEREST-EXPEN> 262,613
<TOTAL-INTEREST-EXPENSE> 81,396
<NET-INCOME> 174,978
6,239
<EARNINGS-AVAILABLE-FOR-COMM> 174,978
<COMMON-STOCK-DIVIDENDS> 174,264
<TOTAL-INTEREST-ON-BONDS> 0 <F1>
<CASH-FLOW-OPERATIONS> 254,251
<EPS-BASIC> 1.28
<EPS-DILUTED> 1.28
<FN>
<FN 1> Required in fiscal year-end only.
</FN>
</TABLE>