Mandaitivu ( Manḍativ) is an island off the coast of the Jaffna Peninsula in northern Sri Lanka, located approximately 3 km south of the city of Jaffna. The island has an area of 7.56 km2 and is divided into three village officer divisions (Mandaitivu East, Mandaitivu South and Mandaitivu West) whose combined population was 1,524 at the 2012 census. Mandaitivu is connected to the Jaffna Peninsula and the neighbouring island of Velanaitivu by a causeway.