Dungannon Lower (named after Dungannon town) is a historic barony in County Tyrone, Northern Ireland. It was created in 1851 with the splitting of the barony of Dungannon. It is bordered by four other baronies in Northern Ireland: Dungannon Middle to the north; Tiranny to the south-east; Clogher to the west; and Omagh East to the north-west. It is also bordered in the south-west by the barony of Trough in the Republic of Ireland.