Major Religions of the World
Ranked by Number of Adherents

(Sizes shown are approximate estimates, and are here mainly for the purpose of ordering the groups, not providing a definitive number. This list is sociological/ statistical in perspective.)

1.      Christianity: 2.1 billion - 33%

2.      Islam: 1.5 billion

3.      Secular/Nonreligious/Agnostic/Atheist: 1.1 billion

4.      Hinduism: 900 million

5.      Chinese traditional religion: 394 million

6.      Buddhism: 376 million

7.      primal-indigenous: 300 million

8.      African Traditional & Diasporic: 100 million

9.      Sikhism: 23 million

10. Juche: 19 million

11. Spiritism: 15 million

12. Judaism: 14 million

13. Baha'i: 7 million

14. Jainism: 4.2 million

15. Shinto: 4 million

16. Cao Dai: 4 million

17. Zoroastrianism: 2.6 million

18. Tenrikyo: 2 million

19. Neo-Paganism: 1 million

20. Unitarian-Universalism: 800 thousand

21. Rastafarianism: 600 thousand