Pooneryn (Poonakari) is a strategically important village in the northern province of Sri Lanka situated just below the Jaffna Peninsula.
Built in the Pooneryn area of north portion of the island first by the Portuguese to protect its possessions in Jaffna, it was expanded by the Dutch till in 1770 it was recorded that it was square shaped with two bastions at opposite corners; the rampart on each of the sides was about 30 metres and was garrisoned till the late 18th century. The British built a rest house in 1805. Since 1983 due to the civil war it was garrisoned by the Sri Lankan Army till it withdrew from the Pooneryn area in 1991; and recaptured in 2009. Ruins of the fort remains, however in bad condition.