Theravada Buddhism is the main, or official religion in Sri Lanka. Based on the 2012 Census, 14,222,844, or 70.2% of people practice Buddhism.[1] People who practice Sri Lankan Buddhism is mostly the Sinhalese population.
Sri Lanka Constitution Article 9 says that Buddhism is the main religion in Sri Lanka. This is because people who practice it wanted Buddhism to have a high position like before colonisation. Buddhism has been inside Sri Lanka for thousands of years.[2]