<TABLE> <S> <C>
<ARTICLE> UT
<LEGEND>
Exhibit 27
AMEREN CORPORATION
10-Q SEPTEMBER 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>
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> SEP-30-2000
<BOOK-VALUE> PER-BOOK
<TOTAL-NET-UTILITY-PLANT> 7,528,343
<OTHER-PROPERTY-AND-INVEST> 234,456
<TOTAL-CURRENT-ASSETS> 1,005,907
<TOTAL-DEFERRED-CHARGES> 89,049
<OTHER-ASSETS> 763,927
<TOTAL-ASSETS> 9,621,682
<COMMON> 1,372
<CAPITAL-SURPLUS-PAID-IN> 1,581,871
<RETAINED-EARNINGS> 1,675,073
<TOTAL-COMMON-STOCKHOLDERS-EQ> 3,258,316
0
235,197
<LONG-TERM-DEBT-NET> 2,202,137
<SHORT-TERM-NOTES> 469,743
<LONG-TERM-NOTES-PAYABLE> 0
<COMMERCIAL-PAPER-OBLIGATIONS> 0
<LONG-TERM-DEBT-CURRENT-PORT> 47,044
0
<CAPITAL-LEASE-OBLIGATIONS> 103,075
<LEASES-CURRENT> 12,653
<OTHER-ITEMS-CAPITAL-AND-LIAB> 3,293,517
<TOT-CAPITALIZATION-AND-LIAB> 9,621,682
<GROSS-OPERATING-REVENUE> 2,961,091
<INCOME-TAX-EXPENSE> 287,196
<OTHER-OPERATING-EXPENSES> 2,100,426
<TOTAL-OPERATING-EXPENSES> 2,387,622
<OPERATING-INCOME-LOSS> 573,469
<OTHER-INCOME-NET> (9,402)
<INCOME-BEFORE-INTEREST-EXPEN> 564,067
<TOTAL-INTEREST-EXPENSE> 123,483
<NET-INCOME> 431,115
9,469
<EARNINGS-AVAILABLE-FOR-COMM> 431,115
<COMMON-STOCK-DIVIDENDS> 261,395
<TOTAL-INTEREST-ON-BONDS> 0 <F1>
<CASH-FLOW-OPERATIONS> 761,920
<EPS-BASIC> 3.14
<EPS-DILUTED> 3.14
<FN>
<F1> Required in fiscal year-end only.
</FN>
</TABLE>