The majority group in Sri Lanka is the Sinhalese, who account for around 75\% of the country's population. They predominantly follow Buddhism and are the largest ethnic group in the country. The Tamils, another significant ethnic group, mostly reside in the northern and eastern parts of Sri Lanka. There have been ethnic tensions between the Sinhalese and Tamils, leading to a civil war that lasted from 1983 to 2009.
In terms of religion, Sinhalese are predominantly Buddhist, while Tamils are mainly Hindus, although there is a significant Christian minority in both groups.