Seán Marty Lockhart (born Seán Martin Lockhart; 22 August 1976) is an Irish dual player of Gaelic games who plays Gaelic football for the Derry county team. He has won an Ulster Senior Football Championship and three National League titles with the county, as well an All-Ireland Under 21 Championship. He also won an All Star for his performances in the 1998 All-Ireland Senior Football Championship. He plays club football for St Mary's Banagher. As a dual player, Lockhart also plays hurling for Banagher, and has in the past also hurled for Derry.