<ARTICLE>  UT
<LEGEND>
        
                                                             Exhibit 27
                               AMEREN CORPORATION
                               10-Q JUNE 30, 1998
                           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>
       
                                           


<PERIOD-TYPE>                                        6-MOS
<FISCAL-YEAR-END>                              DEC-31-1998
<PERIOD-END>                                   JUN-30-1998
<BOOK-VALUE>                                      PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                        6,949,792
<OTHER-PROPERTY-AND-INVEST>                        234,067
<TOTAL-CURRENT-ASSETS>                             798,890
<TOTAL-DEFERRED-CHARGES>                            67,927
<OTHER-ASSETS>                                     829,707
<TOTAL-ASSETS>                                   8,880,383
<COMMON>                                             1,372
<CAPITAL-SURPLUS-PAID-IN>                        1,582,746
<RETAINED-EARNINGS>                              1,383,739
<TOTAL-COMMON-STOCKHOLDERS-EQ>                   2,967,857
<PREFERRED-MANDATORY>                                    0
<PREFERRED>                                        235,197
<LONG-TERM-DEBT-NET>                             2,519,592
<SHORT-TERM-NOTES>                                  77,503
<LONG-TERM-NOTES-PAYABLE>                                0
<COMMERCIAL-PAPER-OBLIGATIONS>                           0
<LONG-TERM-DEBT-CURRENT-PORT>                       69,445
<PREFERRED-STOCK-CURRENT>                                0
<CAPITAL-LEASE-OBLIGATIONS>                         61,907
<LEASES-CURRENT>                                    12,740
<OTHER-ITEMS-CAPITAL-AND-LIAB>                   2,936,142
<TOT-CAPITALIZATION-AND-LIAB>                    8,880,383
<GROSS-OPERATING-REVENUE>                        1,522,587
<INCOME-TAX-EXPENSE>                                88,709
<OTHER-OPERATING-EXPENSES>                       1,215,288
<TOTAL-OPERATING-EXPENSES>                       1,303,997
<OPERATING-INCOME-LOSS>                            218,590
<OTHER-INCOME-NET>                                  (2,519)
<INCOME-BEFORE-INTEREST-EXPEN>                     216,071
<TOTAL-INTEREST-EXPENSE>                            86,238
<NET-INCOME>                                       123,559
<PREFERRED-STOCK-DIVIDENDS>                          6,274
<EARNINGS-AVAILABLE-FOR-COMM>                      123,559
<COMMON-STOCK-DIVIDENDS>                           174,264
<TOTAL-INTEREST-ON-BONDS><F1>                            0
<CASH-FLOW-OPERATIONS>                             245,572
<EPS-PRIMARY>                                         0.90
<EPS-DILUTED>                                         0.90

<FN>
<F1> Required on fiscal year-end only
</FN>