Exhibit 24

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

That the undersigned does hereby make, constitute and appoint T. J. Usher, J. P. Surma, Jr., G. R. Haggerty and Larry G. Schultz or any one of them, my true and lawful attorneys-in-fact to sign and execute for me and on my behalf United States Steel Corporation’s Annual Report on Form 10-K for the year ended December 31, 2004 to be filed with the Securities and Exchange Commission, and any and all amendments to such report to be filed with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1934, as amended, in such form as they or any one or more of them may approve, and to do any and all other acts which said attorneys-in-fact may deem necessary or desirable to enable United States Steel Corporation to comply with said Act and the rules and regulations thereunder.

IN WITNESS WHEREOF, I have hereunto set my hand and seal this 22nd day of February, 2005.

/s/    J. Gary Cooper        

J. Gary Cooper

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

That the undersigned does hereby make, constitute and appoint T. J. Usher, J. P. Surma, Jr., G. R. Haggerty and Larry G. Schultz or any one of them, my true and lawful attorneys-in-fact to sign and execute for me and on my behalf United States Steel Corporation’s Annual Report on Form 10-K for the year ended December 31, 2004 to be filed with the Securities and Exchange Commission, and any and all amendments to such report to be filed with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1934, as amended, in such form as they or any one or more of them may approve, and to do any and all other acts which said attorneys-in-fact may deem necessary or desirable to enable United States Steel Corporation to comply with said Act and the rules and regulations thereunder.

IN WITNESS WHEREOF, I have hereunto set my hand and seal this 22nd day of February, 2005.

/s/  Robert J. Darnall

Robert J. Darnall

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

That the undersigned does hereby make, constitute and appoint T. J. Usher, J. P. Surma, Jr., G. R. Haggerty and Larry G. Schultz or any one of them, my true and lawful attorneys-in-fact to sign and execute for me and on my behalf United States Steel Corporation’s Annual Report on Form 10-K for the year ended December 31, 2004 to be filed with the Securities and Exchange Commission, and any and all amendments to such report to be filed with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1934, as amended, in such form as they or any one or more of them may approve, and to do any and all other acts which said attorneys-in-fact may deem necessary or desirable to enable United States Steel Corporation to comply with said Act and the rules and regulations thereunder.

IN WITNESS WHEREOF, I have hereunto set my hand and seal this 22nd day of February, 2005.

/s/  John G. Drosdick

John G. Drosdick

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

That the undersigned does hereby make, constitute and appoint T. J. Usher, J. P. Surma, Jr., G. R. Haggerty and Larry G. Schultz or any one of them, my true and lawful attorneys-in-fact to sign and execute for me and on my behalf United States Steel Corporation’s Annual Report on Form 10-K for the year ended December 31, 2004 to be filed with the Securities and Exchange Commission, and any and all amendments to such report to be filed with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1934, as amended, in such form as they or any one or more of them may approve, and to do any and all other acts which said attorneys-in-fact may deem necessary or desirable to enable United States Steel Corporation to comply with said Act and the rules and regulations thereunder.

IN WITNESS WHEREOF, I have hereunto set my hand and seal this 22nd day of February, 2005.

/s/  Shirley Ann Jackson

Shirley Ann Jackson

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

That the undersigned does hereby make, constitute and appoint T. J. Usher, J. P. Surma, Jr., G. R. Haggerty and Larry G. Schultz or any one of them, my true and lawful attorneys-in-fact to sign and execute for me and on my behalf United States Steel Corporation’s Annual Report on Form 10-K for the year ended December 31, 2004 to be filed with the Securities and Exchange Commission, and any and all amendments to such report to be filed with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1934, as amended, in such form as they or any one or more of them may approve, and to do any and all other acts which said attorneys-in-fact may deem necessary or desirable to enable United States Steel Corporation to comply with said Act and the rules and regulations thereunder.

IN WITNESS WHEREOF, I have hereunto set my hand and seal this 22nd day of February, 2005.

/s/    Charles R. Lee        

Charles R. Lee

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

That the undersigned does hereby make, constitute and appoint T. J. Usher, J. P. Surma, Jr., G. R. Haggerty and Larry G. Schultz or any one of them, my true and lawful attorneys-in-fact to sign and execute for me and on my behalf United States Steel Corporation’s Annual Report on Form 10-K for the year ended December 31, 2004 to be filed with the Securities and Exchange Commission, and any and all amendments to such report to be filed with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1934, as amended, in such form as they or any one or more of them may approve, and to do any and all other acts which said attorneys-in-fact may deem necessary or desirable to enable United States Steel Corporation to comply with said Act and the rules and regulations thereunder.

IN WITNESS WHEREOF, I have hereunto set my hand and seal this 22nd day of February, 2005.

/s/    Frank J. Lucchino        

Frank J. Lucchino

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

That the undersigned does hereby make, constitute and appoint T. J. Usher, J. P. Surma, Jr., G. R. Haggerty and Larry G. Schultz or any one of them, my true and lawful attorneys-in-fact to sign and execute for me and on my behalf United States Steel Corporation’s Annual Report on Form 10-K for the year ended December 31, 2004 to be filed with the Securities and Exchange Commission, and any and all amendments to such report to be filed with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1934, as amended, in such form as they or any one or more of them may approve, and to do any and all other acts which said attorneys-in-fact may deem necessary or desirable to enable United States Steel Corporation to comply with said Act and the rules and regulations thereunder.

IN WITNESS WHEREOF, I have hereunto set my hand and seal this 22nd day of February, 2005.

/s/    Dan D. Sandman        

Dan D. Sandman

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

That the undersigned does hereby make, constitute and appoint T. J. Usher, J. P. Surma, Jr., G. R. Haggerty and Larry G. Schultz or any one of them, my true and lawful attorneys-in-fact to sign and execute for me and on my behalf United States Steel Corporation’s Annual Report on Form 10-K for the year ended December 31, 2004 to be filed with the Securities and Exchange Commission, and any and all amendments to such report to be filed with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1934, as amended, in such form as they or any one or more of them may approve, and to do any and all other acts which said attorneys-in-fact may deem necessary or desirable to enable United States Steel Corporation to comply with said Act and the rules and regulations thereunder.

IN WITNESS WHEREOF, I have hereunto set my hand and seal this 22nd day of February, 2005.

/s/    Seth E. Schofield        

Seth E. Schofield

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

That the undersigned does hereby make, constitute and appoint T. J. Usher, J. P. Surma, Jr., G. R. Haggerty and Larry G. Schultz or any one of them, my true and lawful attorneys-in-fact to sign and execute for me and on my behalf United States Steel Corporation’s Annual Report on Form 10-K for the year ended December 31, 2004 to be filed with the Securities and Exchange Commission, and any and all amendments to such report to be filed with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1934, as amended, in such form as they or any one or more of them may approve, and to do any and all other acts which said attorneys-in-fact may deem necessary or desirable to enable United States Steel Corporation to comply with said Act and the rules and regulations thereunder.

IN WITNESS WHEREOF, I have hereunto set my hand and seal this 22nd day of February, 2005.

/s/    Thomas J. Usher        

Thomas J. Usher

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

That the undersigned does hereby make, constitute and appoint T. J. Usher, J. P. Surma, Jr., G. R. Haggerty and Larry G. Schultz or any one of them, my true and lawful attorneys-in-fact to sign and execute for me and on my behalf United States Steel Corporation’s Annual Report on Form 10-K for the year ended December 31, 2004 to be filed with the Securities and Exchange Commission, and any and all amendments to such report to be filed with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1934, as amended, in such form as they or any one or more of them may approve, and to do any and all other acts which said attorneys-in-fact may deem necessary or desirable to enable United States Steel Corporation to comply with said Act and the rules and regulations thereunder.

IN WITNESS WHEREOF, I have hereunto set my hand and seal this 22nd day of February, 2005.

/s/    Douglas C. Yearley        

Douglas C. Yearley