It is bounded on the north by the international border with Fermanagh and Northern Ireland, on the east by Cuillaghan, Killywilly, Corranierna and Mullaghduff townlands, on the south by Cullyleenan townland and on the west by Doon, Rakeelan and Gortawee townlands.
On the 1609 Ulster Plantation map it is named ‘Claghan’ (Gaelic ‘Clochán’ meaning a small beehive-shaped stone house), but by the Down Survey of 1655 it was merged into Mullaghduff townland where the combined townland was called ‘Mullaghduffe alias Cloghane alias Cornerin’.