Stephen Michael Gleeson (born 3 August 1988) is an Irish professional footballer, who plays as a midfielder for Scottish Premiership side Aberdeen.
Gleeson played youth football in his native Dublin before coming to England at the age of 15 to join Wolverhampton Wanderers. He rarely played first-team football for them, but spent time on loan to lower-league clubs Stockport County (three separate spells), Hereford United and Milton Keynes Dons, before signing a three-year contract with the latter club in 2009. After five years, during which time he made more than 200 appearances in all competitions, he moved on to Birmingham City. He spent three-and-a-half seasons at Birmingham, making over 100 appearances in the Championship.
After a short spell with Ipswich Town, Gleeson signed for Scottish club Aberdeen in June 2018.
At international level, Gleeson was capped twice for the Republic of Ireland in 2007, and was not capped again for nearly ten years. He also represented his country at under-age levels, and made 16 appearances for the under-21 team.