World Religions By Population 2024. With around 2.3 billion followers, christianity is. According to a demographic study based on analysis of more than 3,000 censuses, surveys, and population registers, christianity remains the world’s largest religion, with approximately 2.2 billion followers, comprising 32.

It provides source material, including censuses and. The world religion database (wrd) contains detailed statistics on religious affiliation for every country of the world.