BOYLE, town, Co. Roscommon, Ireland, on Great Southern railway, 1o64m. north-west by west from Dublin and 28m. south by east from Sligo. Pop. (1926) 2,322. It is situated on both banks of the Boyle, an affluent of the Shannon, between Loughs Gara and Key. Three bridges connect the two parts of the town. There is considerable trade in agricultural produce. To the north of the town stand the extensive ruins of a Cistercian abbey founded in 1161, including remains of a cruciform church, with a fine west front, and Norman and Transitional arcades with carv ing of beautiful detail. There is a large dolmen by the road towards Lough Gara. Boyle was incorporated by James I., and returned two members to the Irish parliament.