The World Religion Database (WRD) contains detailed statistics on religious affiliation for every country of the world. It provides source material, including censuses and surveys, as well as best estimates for every religion to offer a definitive picture of international religious demography. It offers best estimates at multiple dates for each of the world’s religions for the period 1900 to 2050.
World religion database is covered by Thomson Reuters Data Citation Index.
The World Christian Database complements the WRD by providing detailed demographic information on all aspects of global Christianity, including every Christian denomination.