Tyrone, an Irish county in the province of Ulster, bounded by Donegal and Fermanagh on the N.W., W., and S.W., and by Londonderry, Lough, Neagh, Armagh, and Monaghan on the N.E., E., and S.E. It is 48 miles long, with a mean breadth of 28 miles, and has an area of 1,260 square miles. The surface is mostly hilly, rising to a height of 2,236 feet on the N.E. border, and sinking into a plain in the neighbourhood of Lough Neagh. The soil of the lower portions is fertile and well cultivated. There is a coalfield in the E., and marble is quarried near the Monaghan border. Linen and woollen goods, earthenware, whisky, and soap are manufactured. Omagh is the county-town.