an episcopal town of Ireland, county of Galway, on the Harrow, a small affluent of the Clare, 19 miles N.N.E from Galway and 125 from Dublin. It consists chiefly of several streets diverging from a central marketplace, and has of late been considerably improved. Tuam was the seat of a Protestant archbishop from the twelfth century down to the death of the last prelate in 1839, when the see was reduced to a bishopric suffragan to Armagh. It is, however, the seat of a Roman Catholic archbishop, whose cathedral is one of the finest ecclesiastical edifices in Ireland. The Protestant cathedral is a small plain building. The Roman Catholics have here a monastery, a nunnery, the college of St Jarlath, and other educational institutions. Tuam has also a market-house, courthouse, barracks, workhouse, jail, and dispensary. The manufacture of canvass and coarse linen is carried on to some extent; and there are also an extensive brewery and several tanneries and flour-mills in the town. Pop. (1851) 7819, including 2881 in public institutions.