Mountjoy Castle is situated near the village of Brockagh, in Magheralamfield townland in County Tyrone, Northern Ireland, on a hill overlooking Lough Neagh.
Situated atop a hill in County Tyrone, Northern Ireland, Mountjoy Castle is adjacent to the village of Brockagh and lies within the Magheralamfield townland, with a commanding view of Lough Neagh.