Glencull () is a townland in County Tyrone, Northern Ireland. It is situated in the historic barony of Dungannon Lower and the civil parish of Killeeshil and covers an area of . It is the only exclave of Killeeshil.
The townland contains St Malachys Glencull Primary School. The school was opened in 1833 and pupils included poets John Montague and Patrick Farrell.