or Cahin, a market-town in Tipperary, Ireland, on the river Suir, 96 miles S.S.W. from Dublin. It contains a handsome parish church, a Roman Catholic chapel, and a meeting-house of the Society of Friends. There is also a market-house, a fever hospital, several public schools, a police-station house, and large cavalry barracks. In the neighbourhood, on an island on the Suir, is Cahir Castle, the residence of the Earl of Glengall. The trade of the town arises chiefly from the flour-mills in the neighbourhood, although repeated attempts have been made to introduce the manufacture of linen and straw-plait. There is a weekly corn-market in Cahir, and fairs are held seven times a-year. Pop. (1851) 3719.