Maritime county in Counaught, west of Ireland, between Sligo and Galway; has many indentations, the largest Broadhaven, Blacksod, and Clew Bays, and islands Achil and Clare, with a remarkable peninsula The Mullet; mountainous in the W., the E. is more level, and has Lough Conn and the Moy River; much of the county is barren and bog, but crops of cereals and potatoes are raised; cattle are reared on pasture lands; there are valuable slate quarries and manganese mines; Castlebar, in the centre, is the county town; Westport, on Clew Bay, has some shipping.