| Club Gaa: | Killyman St Mary's G.A.C |
| Irish: | Cill na mBán Naoimh Muire C.L.G |
| Founded: | 1964 |
| Province: | Ulster |
| County: | Tyrone |
| Country: | Ireland |
| Nickname: | Groper United |
| Colours: | Yellow and Blue |
| Grounds: | St Mary's Park |
| Coordinates: | 54.5075°N -6.6727°W |
| Kit1: | Seniors |
| Leftarm: | 0000CC |
| Body: | FFFF00 |
| Rightarm: | 0000CC |
| Shorts: | 0000CC |
| Socks: | 0000CC |
| Kit2: | Reserve |
| Leftarm2: | FFFF00 |
| Body2: | 0000CC |
| Rightarm2: | FFFF00 |
| Shorts2: | 0000CC |
| Socks2: | 0000CC |
Killyman St Mary's is a Gaelic Athletic Association (GAC) based in the parish of Dungannon in County Tyrone, Northern Ireland.
The club was established in 1964.