Saint Martin's GAC Desertmartin (Irish: CLG Naomh Mhartain Diseart Mhartain) is a Gaelic Athletic Association club based in Desertmartin, County Londonderry, Northern Ireland.

The club has won the Derry Senior Football Championship once in its history and appeared in four finals.

Desertmartin fields Gaelic football teams at U8, U10, U12, U14, U16, Minor, U21, Reserve and Senior levels.

It was in 1938 that Camogie began in Desertmartin, with the formation of three teams; St. Bridget's, Brackagh and Tirgan.

The club's greatest honour came three years later when it won the 1953 Derry Senior Football Championship, beating Ballerin in the final.

After falling from the Senior ranks, Desertmartin won the Derry Junior Championship for a second time in 1968.