<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>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               MAR-31-1999
<EXCHANGE-RATE>                                      1
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    9,219,634
<OTHER-PROPERTY-AND-INVEST>                  2,416,743
<TOTAL-CURRENT-ASSETS>                       1,085,249
<TOTAL-DEFERRED-CHARGES>                     5,466,737
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                              18,188,363
<COMMON>                                        23,553
<CAPITAL-SURPLUS-PAID-IN>                    3,667,052
<RETAINED-EARNINGS>                            768,993
<TOTAL-COMMON-STOCKHOLDERS-EQ>               4,459,598
<PREFERRED-MANDATORY>                          294,710
<PREFERRED>                                    660,195
<LONG-TERM-DEBT-NET>                         6,335,289
<SHORT-TERM-NOTES>                             145,769
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                 119,965
<LONG-TERM-DEBT-CURRENT-PORT>                  742,822
<PREFERRED-STOCK-CURRENT>                       40,154
<CAPITAL-LEASE-OBLIGATIONS>                          0
<LEASES-CURRENT>                                58,537
<OTHER-ITEMS-CAPITAL-AND-LIAB>               5,331,324
<TOT-CAPITALIZATION-AND-LIAB>               18,188,363
<GROSS-OPERATING-REVENUE>                    1,417,410
<INCOME-TAX-EXPENSE>                            92,925
<OTHER-OPERATING-EXPENSES>                   1,041,687
<TOTAL-OPERATING-EXPENSES>                   1,134,612
<OPERATING-INCOME-LOSS>                        282,798
<OTHER-INCOME-NET>                                   0
<INCOME-BEFORE-INTEREST-EXPEN>                 282,798
<TOTAL-INTEREST-EXPENSE>                       146,077
<NET-INCOME>                                   136,721
<PREFERRED-STOCK-DIVIDENDS>                          0
<EARNINGS-AVAILABLE-FOR-COMM>                        0
<COMMON-STOCK-DIVIDENDS>                        86,138
<TOTAL-INTEREST-ON-BONDS>                      511,753
<CASH-FLOW-OPERATIONS>                         212,630
<EPS-PRIMARY>                                      .60
<EPS-DILUTED>                                      .60