The World Religion database is updated twice a year, generally in January and July.
The "Peoples" table lists 13,800 ethno-linguistic people groups
downgraded estimates for Christians in several Middle East countries
All major world religions, available by geographic region and people groups.
Comprehensive country religious makeup, demographics, and trends.
Religious Diversity Index (RDI) and counts of religions over 10%, over 5%, and over 0.5%.
Population data by country, plus socio-economic, health, environment, and gender indicators.
Historical and current census data on religion by country.
A repository of historical data, including surveys.