The 1846 Parliamentary Gazetteer describes its bounds as roughly a semicircle with a radius of 4 miles centred on Galway town, with Galway Bay to the south, from Forramoyle in the west, through Lough Inch to the southern shore of Lough Corrib in the north, then southeast to the north of Killeen, and down to the bay 11 miles east of Merlin Park.