Sri Lanka last conducted a Census of Population and Housing in 2011/2012, which collected social, economic, and demographic information of every individual and on housing characteristics. 

The Department of Census and Statistics has also released vital statistics to estimate birth rates, death rates, infant mortality rate, and maternal mortality rate for 2015-2020. 

Ethnic groups in Sri Lanka include Sinhalese (74.9%), Sri Lankan Tamil (11.2%), Sri Lankan Moors (9.2%), Indian Tamil (4.2%), and others (0.5%). 

Sinhala (87%) and Tamil (28.5%) are the official and national languages in Sri Lanka. English is also spoken by 23.8% of the population.