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Biggest Religions by Followers

Name the largest religions/faiths by number of followers or percentage of the world population.
Data from Britannica.com
Data is from 2020
Some religions are grouped into broad collections or are not established faiths (highlighted in blue)
Quiz by
OvenBobat
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Last updated: October 5, 2025
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First submittedOctober 5, 2025
Times taken163
Average score50.0%
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Percentage
Population
Answer
31.97%
2,521,460,000
Christianity
24.08%
1,899,103,000
Islam
13.83%
1,090,592,000
Hinduism
9.44%
744,166,000
Agnosticism
6.73%
530,612,000
Buddhism
5.8%
457,672,000
Chinese folk religions
3.65%
288,022,000
Ethnic/Tribal
1.86%
147,009,000
Atheism
0.86%
67,463,000
New Religionists
0.37%
29,254,000
Sikhism
0.19%
14,805,000
Spiritism/Spiritualism
0.19%
14,800,000
Judaism
0.12%
9,150,000
Bahāʾī
0.11%
8,767,000
Daoism
0.11%
8,755,000
Confucianism
0.08%
6,344,000
Jainism
0.04%
2,773,000
Shintō
0.003%
205,000
Zoroastrianism
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2 Comments
ReparZZV2
+1
Level 44
Oct 7, 2025
atheism is wrong
OvenBobat
+1
Level 65
Oct 7, 2025
I'm aware. I just can't find a comprehensive list of data outside of Britannica. If you can, let me know
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