Sammanthurai, is a town in Ampara District of Eastern Province of Sri Lanka. Sammanthurai situated at 7°22′0″N 81°48′0″E, is 4.8 km west of the Bay of Bengal coast. It lies between the towns of Ampara and Karaitivu along the A31 road. It is surrounded by paddy fields and it is renowned for its rice paddies and its inner harbour from ancient times.