Seán Armstrong (born 20 March 1986) is an Irish former Gaelic footballer from Galway.

[1] Seán was a key part of Galway's Under 21 All-Ireland triumph of 2005.

He formed a devastating partnership with Michael Meehan in the final as they scored 6-03 between them in a 6–05 to 4–06 victory over Down to claim the title.

[2] Armstrong announced his retirement from the inter-county scene on 17 December 2014 at the age of 28 citing a loss of his love of the game.

[3] he is also a teacher in St Mary's College