The Top 5 Religions with the Most Followers

  Religion Number of Adherents Year Began Major Deity
1 Christianity 2.1 billion 27 AD/CE Jesus of Nazareth
2 Islam 1.3 billion 622 AD/CE Allah
3 Hinduism 900 million 1500 BC/BCE Brahman
4 Buddhism 376 million 6th century BC/BCE Buddha
5 Sikhism 23 million 1469-1708 AD/CE Vahiguru
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Sources:  Various including Adherents.com

List Notes: 
Religions with the Most Followers

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