Shay Brennan (born 1973/1974) is an Irish Fianna Fáil politician who has been a TD for the Dublin Rathdown constituency since the 2024 general election.
He is the son of Séamus Brennan, and unsuccessfully contested the 2009 Dublin South by-election which followed the death of his father in 2008.
Brennan was a member of Dún LaoghaireâÂÂRathdown County Council from 2014 until his election to the Dáil in 2024.