United States Steel (X) 8-K Departure of Directors or Certain Officers

Exhibit 99.1

United States Steel Corporation

Public Affairs

600 Grant Street

Pittsburgh, PA 15219-2800

News

Contact:    Courtney Boone

412.433.6791

Sarah Cassella

412.433.6777

FOR IMMEDIATE REVIEW

U. S. STEEL GENERAL COUNSEL AND SENIOR VICE PRESIDENT – CORPORATE AFFAIRS JAMES D. GARRAUX TO RETIRE

PITTSBURGH, Aug. 16, 2013 – United States Steel Corporation (NYSE: X) Chairman and Chief Executive Officer John P. Surma announced today that General Counsel and Senior Vice President – Corporate Affairs James D. Garraux has informed the company of his plan to retire by the end of 2013 after 34 years with the company.

Garraux, 60, was named general counsel and senior vice president, labor relations and environmental affairs in 2007. He assumed responsibilities for governmental affairs and public policy initiatives in 2009, and was named general counsel and senior vice president – corporate affairs.

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For more information about U. S. Steel, visit www.ussteel.com.