a municipal and parliamentary borough and market-town of Ireland, county Tyrone, standing on the acclivity of a hill, 8 miles from Lough Neagh. Pop. (1851) 3854. It consists of a square, with several diverging streets, and is generally well built. The chief public buildings are the parish church, Roman Catholic chapel, two Presbyterian, and two Methodist meeting-houses, courthouse, bridewell, market-house, savings-bank, fever hospital, temperance hall, and an endowed school. Manufactures—chiefly flins and coarse earthenware. Market-day Thursday. Dungannon returns one member to parliament.