National Steel may refer to:

• National Steel Corporation (1929), a defunct steel production company in the United States
• National Steel Company (1899), part of the 1901 merger that created U.S. Steel
• National Steel and Shipbuilding Company, a shipyard in San Diego, California
• National Steel (album), a blues album by Colin James
• National Steel, a type of guitar made by the National String Instrument Corporation
• "National Steel", a song by Kathleen Edwards on the album Failer