St Mary's College is a co-educational (formerly boys) secondary school in Galway, Ireland.
The college currently caters to approximately 400 students, offering a wide and varied range of curricular subjects and many co-curricular and extra-curricular activities.
The building is faced with granite and limestone, the two predominant stones of County Galway's geology.
Former students include former Fianna Fáil government minister Frank Fahey, the actor Mick Lally and deceased Bishop of Galway, James McLoughlin.
Former students in the sports news include Galway Gaelic footballers Seamus McHugh, Paul Conroy, Eddie Hoare, Gareth Bradshaw, Dessie Conneely and David Wynne, soccer players Stephen O'Donnell (Dundalk AFC captain) and Vinny Faherty and Galway hurlers Joe Connolly, Fergal Moore, Cathal Jordan, Tadhg Haran, Dean Higgins and Tony Og Regan.