Population Of The World 2024 By Religion. Christianity is the largest religion in the world. Christianity is the largest religion in the world, with an estimated 2.38 billion followers.

 — as of 2020, an estimated 429 million people, about 6% of the world’s total population, were adherents of folk or traditional religions. About pew research center pew research center is a nonpartisan, nonadvocacy fact tank that informs.