St. Mary's is a civil parish in County Westmeath, Ireland. It is located about westâÂÂsouthâÂÂwest of Mullingar.
St. Mary's is the sole civil parish in the barony of Brawny in the province of Leinster. The civil parish covers .
St. Mary's civil parish comprises part of the town of Athlone, the village of Ballykeeran and 62 townlands: Aghacocara, Ankersbower, Ardnaglug, Athlone, Ballygowlan, Ballykeeran, Blyry Lower, Blyry Upper, Bunnahinly, Bunnavally, Cannonsfield, Cappankelly, Carrickobreen, Cartrontroy, Cloghanboy (Cooke), Cloghanboy (Homan), Cloghanboy (Strain), Cloghanboy West, Clonagh, Clonbrusk, Cloonbonny, Cloondalin, Collegeland, Cookanamuck, Coosan, Cornamaddy, Cornamagh, Corralena, Creaghduff, Creaghduff South, Creggan Lower, Creggan Upper, Crosswood, Curragh, Curragh (Mechum), Derries, Friars Island, Garrankesh, Garrycastle, Garrynafela, Goldenisland (St. George), Goldenisland, Goldenisland (Kilmaine), Hillquarter, Kilmacuagh (Castlemaine), Kilmacuagh (Cooke), Kilmacuagh (Mechum), Kilnafaddoge, Kippinstown, Lissywollen, Loughanaskin, Loughandonning, Magheranerla, Meehan, Moydrum (West), Retreat, Srameen, Tullin, Tullycross and Warrensfields.
The neighbouring civil parishes are: Kilkenny West to the north, Ballyloughloe to the east, Kilcleagh to the southâÂÂeast and St. Peter's (County Roscommon) to the west.