Karainagar (Tamil: காரைநகர்) (pronounced Kaarai-Nagar) is located 20 km from Jaffna, Sri Lanka, on the Karaitivu (Island).

[1] In Tamil, it means the many karai trees but also means the coast, as derived from the Tamil word 'kadar-karai' meaning a settlement (or town) on the sea coast (kadar or kadal means sea and karai means coast) which is borne by the fact that Karainagar is a coastal town.

Karainagar island is about 10-square-mile (26 km2) area and the registered voters 20,000 voted in 1977 national election.

The current population stands at 11,000.

This Northern Province, Sri Lanka location article is a stub.