<ARTICLE> UT
<LEGEND>
This schedule contains summary financial information extracted from the
related Form 10-Q financial statements for FirstEnergy Corp. and is
qualified in its entirety by reference to such financial statements.
(Amounts in 1,000's, except earnings per share.)
</LEGEND>
<CIK> 0001031296
<NAME> FIRSTENERGY CORP.
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               SEP-30-1999
<EXCHANGE-RATE>                                      1
<BOOK-VALUE>                                  PER-BOOK
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<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                              18,074,880
<COMMON>                                        23,302
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<RETAINED-EARNINGS>                            909,592
<TOTAL-COMMON-STOCKHOLDERS-EQ>               4,536,645
<PREFERRED-MANDATORY>                          274,996
<PREFERRED>                                    648,395
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<SHORT-TERM-NOTES>                             167,649
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                 119,982
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<OPERATING-INCOME-LOSS>                        882,614
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<INCOME-BEFORE-INTEREST-EXPEN>                 882,614
<TOTAL-INTEREST-EXPENSE>                       434,748
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<PREFERRED-STOCK-DIVIDENDS>                          0
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<COMMON-STOCK-DIVIDENDS>                       256,683
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<EPS-BASIC>                                       1.97
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