Inniskeen Grattans Gaelic Athletic Club is a Gaelic Athletic Association club, based in Inniskeen, County Monaghan, Ireland.

The club participates in both Gaelic football and hurling competitions organized by Monaghan GAA county board.

In 2010, the club won its first ever Monaghan Senior Hurling Championship title.

In August 1888, Inniskeen played Cavan champions Maghera Mac Finns in the first Ulster Senior Football Championship Final in Drogheda which ended in a draw, 0-2 each.

Inniskeen won the replay in Drogheda on 9 December by 0-3 to 0-1 making Monaghan the first ever Ulster S.F.