India–Sri Lanka maritime boundary agreements

India–Sri Lanka maritime boundary agreements were held in 1974 and 1976 between India and the Sri Lanka that define the international maritime boundary between the two states. Treaties on maritime boundary were necessary to facilitate law enforcement and resource management, and to avoid conflict, in the waters since both countries located closely in the Indian ocean, particularly in Palk Strait.

The first agreement was concluded in 1974 between two states regarding to maritime boundary in historic waters of Palk Strait. The first agreement was signed on March 22, 1976 in order to define the maritime boundaries in Gulf of Mannar and Bay of Bengal and related matters. The second agreement between two states was to sort the boundaries in the Gulf of Mannar and Bay of Bengal.

India, Sri Lanka and Maldives signed another agreement for determination of the tri-junction point in the Gulf of Mannar in July 1976. Later in November, India and Sri Lanka signed another agreement to extend the maritime boundary in the Gulf of Mannar.