St Mary's 0-12
Second-half goals from substitute Cian Killoran (2) and Brian Morahan proved to be the difference as Tubbercurry celebrated a first Sligo SFC success in 23 years at Markievicz Park.
Last year's defeated finalists fell 0-2 to 0-5 in arrears early on but fought back to go in at the break with a 0-6 to 0-5 lead.
County star David Kelly's finger prints were all over Tubbercurry's best moments and they hit two goals in as many minutes at the start of the second-half.
St Mary's cause wasn't helped by black cards for defenders Jonathan Lynch and Caolan O'Grady.
Killoran raised a second green flag to add gloss to Tubbercurry's victory.
Tubbercurry - D McDonagh; E Coleman, D Maye, J Kelly; F Cretaro, B Curran (0-1), C Surlis; S Gilmartin, M Burke; B Morahan (1-1), D Kelly (0-2), G Curran (0-1); S Kilcoyne, D Walsh (0-1), S Matthews (0-5, 4f). Subs: C Killoran (2-0) for S Kilcoyne, B Murphy for M Burke, C Gilmartin for J Kelly, C McGee for S Matthews, F McDonagh (0-1) for B Morahan, D Wynne for F Cretaro.
St Mary's - M Rooney; K Coen, B McGarry, C O'Grady; J Martyn, J Davey, J Lynch; D O'Connor, B Smith; C Egan, M Breheny (0-6, 5f), C Breheny (0-1); C Kelly, S Coen (0-3), M McGoldrick (0-1). Subs: S Keenan (0-1'45) for J Lynch (BC), G O'Kelly Lynch for C O'Grady (BC), N McManus for D O'Connor, D Kilgallon for C Kelly.
Referee - J Gilmartin.