Derrycassan is bounded on the north by Kilnavert and Corran townlands, on the west by Camagh, Sruhagh and Gorteen, Templeport townlands, on the south by Derryniggin in County Leitrim and Burren townla

Corran is a townland in the civil parish of Templeport, County Cavan, Ireland. It lies in the Roman Catholic parish of Templeport and the barony of Tullyhaw.