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. It is within Newry, Mourne and Down District.
Rostrevor had a population of 2,433 in the 2001 Census.