Devenish St Mary's is a Gaelic football club based in the village of Garrison, County Fermanagh, Northern Ireland.

The club was founded in 1917, but did not affiliate until 25 July 1926.

The club won the Fermanagh Senior Football Championship for the first time in 1960 as Devenish/Mulleek, and went on to win the county title four more times in the 1960s, including a three in a row from 1965 to 1967.

[1] The club's tenth and most recent championship win came in 1996.

[3] Devenish lost the final by seven points to Derrygonnelly.