Nallur (; ) is a town in the northern Jaffna District, Sri Lanka. It is located 3 km south from the city centre of Jaffna. Nallur is famous for the Nallur Kandaswamy temple a popular place of worship and respectively the largest Saiva temple on the peninsula. It is also famous for being the historical capital of the old Jaffna Kingdom and birthplace of renowned philosopher and theologian Arumuka Navalar.