<ARTICLE>   UT
<LEGEND>


                                                                      Exhibit 27
                               AMEREN CORPORATION
                               10-Q MARCH 31, 1999
                           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>                                                       3-MOS
<FISCAL-YEAR-END>                                             DEC-31-1999
<PERIOD-END>                                                  MAR-31-1999
<BOOK-VALUE>                                                     PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                                       6,910,554
<OTHER-PROPERTY-AND-INVEST>                                       247,532
<TOTAL-CURRENT-ASSETS>                                            755,689
<TOTAL-DEFERRED-CHARGES>                                           84,132
<OTHER-ASSETS>                                                    815,189
<TOTAL-ASSETS>                                                  8,813,096
<COMMON>                                                            1,372
<CAPITAL-SURPLUS-PAID-IN>                                       1,582,524
<RETAINED-EARNINGS>                                             1,439,470
<TOTAL-COMMON-STOCKHOLDERS-EQ>                                  3,023,366
<PREFERRED-MANDATORY>                                                   0
<PREFERRED>                                                       235,197
<LONG-TERM-DEBT-NET>                                            2,234,967
<SHORT-TERM-NOTES>                                                 35,020
<LONG-TERM-NOTES-PAYABLE>                                               0
<COMMERCIAL-PAPER-OBLIGATIONS>                                          0
<LONG-TERM-DEBT-CURRENT-PORT>                                     195,944
<PREFERRED-STOCK-CURRENT>                                               0
<CAPITAL-LEASE-OBLIGATIONS>                                        50,687
<LEASES-CURRENT>                                                   16,194
<OTHER-ITEMS-CAPITAL-AND-LIAB>                                  3,021,721
<TOT-CAPITALIZATION-AND-LIAB>                                   8,813,096
<GROSS-OPERATING-REVENUE>                                         735,902
<INCOME-TAX-EXPENSE>                                               35,230
<OTHER-OPERATING-EXPENSES>                                        600,985
<TOTAL-OPERATING-EXPENSES>                                        636,215
<OPERATING-INCOME-LOSS>                                            99,687
<OTHER-INCOME-NET>                                                    397
<INCOME-BEFORE-INTEREST-EXPEN>                                    100,084
<TOTAL-INTEREST-EXPENSE>                                           42,553
<NET-INCOME>                                                       54,359
<PREFERRED-STOCK-DIVIDENDS>                                         3,172
<EARNINGS-AVAILABLE-FOR-COMM>                                      54,359
<COMMON-STOCK-DIVIDENDS>                                           87,132
<TOTAL-INTEREST-ON-BONDS>                                               0  <F1>
<CASH-FLOW-OPERATIONS>                                            167,962
<EPS-PRIMARY>                                                        0.40
<EPS-DILUTED>                                                        0.40

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