Sri Lanka is officially a Buddhist country, while Sri Lankans practice a variety of religions. As of the 2012 census, 70.2% of Sri Lankans were Buddhists, 12.6% were Hindus, 9.7% were Muslims, 7.4% were Christians. Buddhism is declared as the State religion of Sri Lanka and has been given special privileges in the Sri Lankan constitution such as the government is bound for protection and fostering of Buddhist Dharma throughout the nation. However, the constitution also provides for freedom of religion and right to equality among all its citizens. In 2008 Sri Lanka was the third most religious country in the world according to a Gallup poll, with 99% of Sri Lankans saying religion is an important part of their daily life.

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.