a market-town of Ireland, in the county of Galway, at the head of Lough Derg, 39 miles S.E. of Galway, and 94 W.S.W. of Dublin. Though at one time a place of some importance, it is now but a poor town. There are here a fine parish church in the perpendicular style, with a lofty spire; a Roman Catholic church, courthouse, national school, dispensary, workhouse, and jail. The ruins of Portumna castle, and of an old monastery, are also to be seen here. Tobacco is manufactured; and there is some trade. Six fairs are held annually. (Pop. (1851) 1542.