Belturbet (Irish: Béal Tairbirt, meaning "mouth of the isthmus") is a town in County Cavan, Ireland. It is 14 km (8.7 mi) from Cavan town 123 km (76 mi) from Dublin city. Belturbet lies on the N3 road. It is 4 km (2.5 mi) from the border with Northern Ireland between the counties of Cavan and Fermanagh and is 36 km (22 mi) south of Enniskillen.