| Club Gaa: | Seán McDermott's |
| Irish: | Seán Mac Diarmada CLG |
| Founded: | 1947 |
| Nickname: | The Seán's |
| Province: | Leinster |
| County: | Louth |
| Colours: | Green and Red |
| Grounds: | Páirc Mac Diarmada, Mountrush, Ardee, County Louth |
| Coordinates: | 53.8871°N -6.5956°W |
| Pattern B: | _collar_red |
| Pattern La: | _redborder |
| Pattern Ra: | _redborder |
| Pattern Sh: | _green_sides |
| Leftarm: | 008000 |
| Body: | 008000 |
| Rightarm: | 008000 |
| Shorts: | FF0000 |
| Socks: | FF0000 |
Seán McDermott's GFC is a Gaelic Football club located in Mountrush, a townland in the civil parish of Ardee, County Louth, Ireland, which fields teams in competitions organised by Louth GAA. 'The Seán's' compete in the Louth Junior Championship[1] and Division 3B of the county football Leagues. Aidan Shevlin is the senior team manager.[2]
The club is named after County Leitrim republican Seán Mac Diarmada, who was executed for his participation in the Easter Rising of 1916. Players are drawn from the neighbouring Ardee townlands of Cookstown and Mountrush.
In 1974, the club won the county Junior 'Double' of League and Championship titles.[3] Dundalk Young Irelands were defeated in the MacArdle Cup final, while in the Championship title match, the Sean's triumphed over Ardee neighbours St Mary's, on a scoreline of 0–07 to 0–05.[4]
The club has reached the final of the Louth Intermediate Championship twice and lost both times, to Stabannon Parnells in 1989[5] and Naomh Fionnbarra of Togher in 2001, after a replay.[6]
In 2022, the club reached the final of the Kevin Mullen Plate competition, only to be beaten by Stabannon Parnells.[7]