<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.)

<CIK> 0001031296
<NAME> FIRSTENERGY CORP.
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-END>                               SEP-30-2000
<EXCHANGE-RATE>                                      1
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    7,499,556
<OTHER-PROPERTY-AND-INVEST>                  2,733,288
<TOTAL-CURRENT-ASSETS>                       1,315,710
<TOTAL-DEFERRED-CHARGES>                     6,419,025
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                              17,967,579
<COMMON>                                        22,745
<CAPITAL-SURPLUS-PAID-IN>                    3,493,978
<RETAINED-EARNINGS>                          1,167,041
<TOTAL-COMMON-STOCKHOLDERS-EQ>               4,683,764
<PREFERRED-MANDATORY>                          234,610
<PREFERRED>                                    648,395
<LONG-TERM-DEBT-NET>                         5,725,011
<SHORT-TERM-NOTES>                             503,592
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                 159,957
<LONG-TERM-DEBT-CURRENT-PORT>                  364,275
<PREFERRED-STOCK-CURRENT>                       35,466
<CAPITAL-LEASE-OBLIGATIONS>                          0
<LEASES-CURRENT>                                47,056
<OTHER-ITEMS-CAPITAL-AND-LIAB>               5,565,453
<TOT-CAPITALIZATION-AND-LIAB>               17,967,579
<GROSS-OPERATING-REVENUE>                    5,201,679
<INCOME-TAX-EXPENSE>                           322,241
<OTHER-OPERATING-EXPENSES>                   4,005,170
<TOTAL-OPERATING-EXPENSES>                   4,327,411
<OPERATING-INCOME-LOSS>                        874,268
<OTHER-INCOME-NET>                                   0
<INCOME-BEFORE-INTEREST-EXPEN>                 874,268
<TOTAL-INTEREST-EXPENSE>                       400,559
<NET-INCOME>                                   473,709
<PREFERRED-STOCK-DIVIDENDS>                          0
<EARNINGS-AVAILABLE-FOR-COMM>                        0
<COMMON-STOCK-DIVIDENDS>                       251,909
<TOTAL-INTEREST-ON-BONDS>                      437,343
<CASH-FLOW-OPERATIONS>                       1,107,936
<EPS-BASIC>                                       2.12
<EPS-DILUTED>                                     2.12