WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>


<ARTICLE> UT
<LEGEND>

                                                                      Exhibit 27

                             UNION ELECTRIC COMPANY
                               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)

</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>                                  5,360,166
<OTHER-PROPERTY-AND-INVEST>                                  191,687
<TOTAL-CURRENT-ASSETS>                                       670,462
<TOTAL-DEFERRED-CHARGES>                                      61,396
<OTHER-ASSETS>                                               753,448
<TOTAL-ASSETS>                                             7,037,159
<COMMON>                                                     510,619
<CAPITAL-SURPLUS-PAID-IN>                                    701,896
<RETAINED-EARNINGS>                                        1,204,696
<TOTAL-COMMON-STOCKHOLDERS-EQ>                             2,417,211
<PREFERRED-MANDATORY>                                              0
<PREFERRED>                                                  155,197
<LONG-TERM-DEBT-NET>                                       1,813,987
<SHORT-TERM-NOTES>                                                 0
<LONG-TERM-NOTES-PAYABLE>                                          0
<COMMERCIAL-PAPER-OBLIGATIONS>                                     0
<LONG-TERM-DEBT-CURRENT-PORT>                                      0
<PREFERRED-STOCK-CURRENT>                                          0
<CAPITAL-LEASE-OBLIGATIONS>                                  105,675
<LEASES-CURRENT>                                              12,782
<OTHER-ITEMS-CAPITAL-AND-LIAB>                             2,532,307
<TOT-CAPITALIZATION-AND-LIAB>                              7,037,159
<GROSS-OPERATING-REVENUE>                                  1,243,482
<INCOME-TAX-EXPENSE>                                          89,484
<OTHER-OPERATING-EXPENSES>                                   974,210
<TOTAL-OPERATING-EXPENSES>                                 1,063,694
<OPERATING-INCOME-LOSS>                                      179,788
<OTHER-INCOME-NET>                                             8,370
<INCOME-BEFORE-INTEREST-EXPEN>                               188,158
<TOTAL-INTEREST-EXPENSE>                                      62,070
<NET-INCOME>                                                 126,088
<PREFERRED-STOCK-DIVIDENDS>                                    4,409
<EARNINGS-AVAILABLE-FOR-COMM>                                121,679
<COMMON-STOCK-DIVIDENDS>                                     138,150
<TOTAL-INTEREST-ON-BONDS>                                          0  <F1>
<CASH-FLOW-OPERATIONS>                                       161,359
<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>




</TABLE>