St Brigid's GAA Club (Irish: Cumann Naomh Bríd) is a Gaelic Athletic Association club based in Castleknock, Fingal, Ireland which serves Castleknock, Clonsilla, Blanchardstown and Corduff.

The club supports 70 teams, from nursery level (four- to seven-year-olds) to adults, in hurling, football, camogie, women's football, handball and badminton.

The club won its second Dublin SFC title in 2011, but lost the year's Leinster Club SFC final to Garrycastle in an injury-time free goal.

[1] Dual All Ireland Handball Senior Singles champion Eoin Kennedy is a club member.

In 2013, Tony McEntee was appointed as manager of the St Brigid's senior football team, succeeding Gerry McEntee and Mark Byrne.