About The World Religion Database

The World Religion Database (WRD) contains detailed statistics on religious affiliation for every country of the world. It provides information from country censuses as well as best estimates for every religion to offer a definitive picture of religion and non-religion in the past, present, and future.

The WRD offers best estimates at multiple dates for each of the world’s religions (18 categories, including atheists and agnostics) for the period 1900 to 2050. The WRD will be updated with new information as it becomes available, such as estimates of religious affiliation at the province level within countries and religious freedom information for all countries.


All major world religions, available by geographic region and people groups.


Comprehensive country religious makeup, demographics, and trends.

Religious diversity

Religious Diversity Index (RDI) and counts of religions over 10%, over 5%, and over 0.5%.

Contextual data

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.