FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * CAVALIER LYNNETTE M   2. Issuer Name and Ticker or Trading Symbol FIRSTENERGY CORP [FE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Vice President (Last) (First) (Middle) 76 SOUTH MAIN STREET 3. Date of Earliest Transaction (Month/Day/Year) 03/01/2005 (Street) AKRON, OH 44308 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 03/01/2005   A   40,000 (1) A $ 41.42 40,764.476 D   Common Stock               4,397.5281 I by Savings Plan

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Stock Options (Right to buy)

$ 27.75

11/22/2004

11/22/2010

Common Stock

5,000

5,000

D

Stock Options (Right to buy)

$ 29.5

05/16/2005

05/16/2011

Common Stock

15,000

15,000

D

Stock Options (Right to buy)

$ 29.71

03/01/2004

03/01/2013

Common Stock

17,500

17,500

D

Stock Options (Right to buy)

$ 34.45

04/01/2003

04/01/2012

Common Stock

12,000

12,000

D

Stock Options (Right to buy)

$ 38.76

03/01/2005

03/01/2014

Common Stock

18,000

18,000

D

Phantom 3/02D

$ 1

03/01/2005

M

347.454

02/06/2004

03/01/2005

Common Stock

347.454

$ 41.42

0

D

Phantom / Retirement

$ 1 (2)

03/01/2005

A

347.454

(3)

(3)

Common Stock

347.454

$ 41.42

347.454

D

Phantom 3/03D

$ 1

03/01/2003

03/01/2006

Common Stock

2,350.776

2,350.776

D

Phantom3/04D

$ 1

03/12/2004

03/01/2007

Common Stock

1,867.953

1,867.953

D

Phantom 3/05D

$ 1

02/25/2005

03/01/2008

Common Stock

2,560.543

2,560.543

D

RSUP1

$ 1 (2)

03/01/2005

A

1,902 (4)

03/01/2008

03/01/2008

Common Stock

1,902

$ 41.42

1,902

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
CAVALIER LYNNETTE M 76 SOUTH MAIN STREET AKRON, OH 44308			Vice President

Signatures

David W. Whitehead, POA		03/03/2005
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	This restricted stock was issued on 3/1/2005. 50% of this restricted stock vests in 3 years, and 50% 3 years thereafter.
(2)	1 for 1
(3)	These transactions reflect the extension of the expiration date of phantom stock from 3/1/2005 to "retirement" or "other termination of employment" under arrangements approved by the Compensation Committee, and reflects the stock moving to the "retirement" account from the Phantom 3/02D.
(4)	The performance based restricted stock units, which were granted March 1, 2005, will earn dividends. The reported number of units reflects 75% of the total amount of units granted, and is the amount the employee is guaranteed to realize. The actual number realized could be 25% higher or 25% lower than the total amount of units granted.

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