<ARTICLE>   UT
<LEGEND>

                                                      Exhibit 27

                             UNION ELECTRIC COMPANY
                             10-Q SEPTEMBER 30, 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)

</LEGEND>




                                                                                 
<PERIOD-TYPE>                                                                               9-MOS
<FISCAL-YEAR-END>                                                                     DEC-31-1999
<PERIOD-END>                                                                          SEP-30-1999
<BOOK-VALUE>                                                                             PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                                                               5,322,803
<OTHER-PROPERTY-AND-INVEST>                                                               172,477
<TOTAL-CURRENT-ASSETS>                                                                    932,685
<TOTAL-DEFERRED-CHARGES>                                                                   35,565
<OTHER-ASSETS>                                                                            757,392
<TOTAL-ASSETS>                                                                          7,220,922
<COMMON>                                                                                  510,619
<CAPITAL-SURPLUS-PAID-IN>                                                                 701,896
<RETAINED-EARNINGS>                                                                     1,336,756
<TOTAL-COMMON-STOCKHOLDERS-EQ>                                                          2,549,271
<PREFERRED-MANDATORY>                                                                           0
<PREFERRED>                                                                               155,197
<LONG-TERM-DEBT-NET>                                                                    1,625,033
<SHORT-TERM-NOTES>                                                                              0
<LONG-TERM-NOTES-PAYABLE>                                                                       0
<COMMERCIAL-PAPER-OBLIGATIONS>                                                                  0
<LONG-TERM-DEBT-CURRENT-PORT>                                                             100,000
<PREFERRED-STOCK-CURRENT>                                                                       0
<CAPITAL-LEASE-OBLIGATIONS>                                                                96,300
<LEASES-CURRENT>                                                                           19,312
<OTHER-ITEMS-CAPITAL-AND-LIAB>                                                          2,675,809
<TOT-CAPITALIZATION-AND-LIAB>                                                           7,220,922
<GROSS-OPERATING-REVENUE>                                                               2,033,288
<INCOME-TAX-EXPENSE>                                                                      216,854
<OTHER-OPERATING-EXPENSES>                                                              1,415,548
<TOTAL-OPERATING-EXPENSES>                                                              1,632,402
<OPERATING-INCOME-LOSS>                                                                   400,886
<OTHER-INCOME-NET>                                                                         10,685
<INCOME-BEFORE-INTEREST-EXPEN>                                                            411,571
<TOTAL-INTEREST-EXPENSE>                                                                   88,432
<NET-INCOME>                                                                              323,139
<PREFERRED-STOCK-DIVIDENDS>                                                                 6,613
<EARNINGS-AVAILABLE-FOR-COMM>                                                             316,526
<COMMON-STOCK-DIVIDENDS>                                                                  191,380
<TOTAL-INTEREST-ON-BONDS>                                                                       0  <F1>
<CASH-FLOW-OPERATIONS>                                                                    638,941
<EPS-BASIC>                                                                                  0.00  <F2>
<EPS-DILUTED>                                                                                0.00  <F2>


<FN>
<F1>  Required in fiscal year-end only.
<F2>  Information not normally disclosed in financial statements and notes.
</FN>