<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> 6-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-END> JUN-30-1999 <EXCHANGE-RATE> 1 <BOOK-VALUE> PER-BOOK <TOTAL-NET-UTILITY-PLANT> 9,224,174 <OTHER-PROPERTY-AND-INVEST> 2,417,962 <TOTAL-CURRENT-ASSETS> 1,411,430 <TOTAL-DEFERRED-CHARGES> 5,329,618 <OTHER-ASSETS> 0 <TOTAL-ASSETS> 18,383,184 <COMMON> 23,449 <CAPITAL-SURPLUS-PAID-IN> 3,640,771 <RETAINED-EARNINGS> 809,017 <TOTAL-COMMON-STOCKHOLDERS-EQ> 4,473,237 <PREFERRED-MANDATORY> 280,996 <PREFERRED> 648,395 <LONG-TERM-DEBT-NET> 6,142,847 <SHORT-TERM-NOTES> 108,787 <LONG-TERM-NOTES-PAYABLE> 0 <COMMERCIAL-PAPER-OBLIGATIONS> 119,982 <LONG-TERM-DEBT-CURRENT-PORT> 1,096,185 <PREFERRED-STOCK-CURRENT> 44,264 <CAPITAL-LEASE-OBLIGATIONS> 0 <LEASES-CURRENT> 60,796 <OTHER-ITEMS-CAPITAL-AND-LIAB> 5,407,695 <TOT-CAPITALIZATION-AND-LIAB> 18,383,184 <GROSS-OPERATING-REVENUE> 2,941,291 <INCOME-TAX-EXPENSE> 194,342 <OTHER-OPERATING-EXPENSES> 2,191,467 <TOTAL-OPERATING-EXPENSES> 2,385,809 <OPERATING-INCOME-LOSS> 555,482 <OTHER-INCOME-NET> 0 <INCOME-BEFORE-INTEREST-EXPEN> 555,482 <TOTAL-INTEREST-EXPENSE> 293,439 <NET-INCOME> 262,043 <PREFERRED-STOCK-DIVIDENDS> 0 <EARNINGS-AVAILABLE-FOR-COMM> 0 <COMMON-STOCK-DIVIDENDS> 171,436 <TOTAL-INTEREST-ON-BONDS> 514,463 <CASH-FLOW-OPERATIONS> 485,411 <EPS-BASIC> 1.15 <EPS-DILUTED> 1.15