Rostrevor is a village and townland in County Down, Northern Ireland. It lies at the foot of Slieve Martin on the coast of Carlingford Lough, near Warrenpoint. The Kilbroney River flows through the village and Rostrevor Forest is nearby. 7.5 miles south-east of Newry, the village is within the Newry, Mourne and Down local government district. Rostrevor had a population of 2,800 in the 2011 Census.