Batticaloa is a major city in the Eastern Province, Sri Lanka, and its former capital. It is the administrative capital of the Batticaloa District. The city is the seat of the Eastern University of Sri Lanka and is a major commercial centre. It is on the east coast, 111 kilometres (69 mi) south of Trincomalee, and is situated on an island. Pasikudah is a popular tourist destination situated 35 km (22 mi) northwest with beaches and flat year-round warm-water shallow-lagoons.

The Eastern Province is one of the nine provinces of Sri Lanka, the first level administrative division of the country. The provinces have existed since the 19th century but did not have any legal status until 1987 when the 13th Amendment to the Constitution of Sri Lanka established provincial councils. Between 1988 and 2006 the province was temporarily merged with the Northern Province to form the North Eastern Province. The capital of the province is Trincomalee. Kalmunai is the largest and most populous city of Eastern Province.