1. Christianity: 2.1 billion
Damn it, i fit into that catogory, im an atheist but wasnt given a choice. I bet theres millions like me just in the UK. And proabably many, many more in the US.
I estimate the true number of true Christians (people who attend church) to be around 500 million less. And most likely atheist to be 500 million more.
1. Secular/Nonreligious/Agnostic/Atheist: 1.6 billion
2. Christianity: 1.5 billion
3. Islam: 1.5 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
22. Scientology: 500 thousand
Theres the true list BTW.
