Largest religious groups
Worldwide percentage of Adherents by Religion, 2010 
Christianity (31.5%)
Islam (23.2%)
Irreligion (16.3%)
Hinduism (15.0%)
Buddhism (7.1%)
Folk religions (5.9%)
Other religions (1%)

 Largest religious groups

Religion Number of followers 
(in millions) Cultural tradition Founded References
Christianity 2,420 Abrahamic religions Middle East 
Islam 1,800 Abrahamic religions Middle East 
Hinduism 1,150 Indian religions (Dharmic) Indian subcontinent 
Buddhism 520 Indian religions (Dharmic) Indian subcontinent 
Folk religion 400 Depends on the region All around globe 

Medium-sized religions

Religion Number of followers 
(in millions) Cultural tradition Founded  
Taoism 12–173 Chinese religions China 
Shinto 100 Japanese religions Japan 
Falun Gong 80–100 Chinese religions China, 20th century 
Sikhism 30 Indian religions (Dharmic) Indian subcontinent, 15th century 
Judaism 14.5 Abrahamic religions Levant (Middle East) 
Korean shamanism 5–15 Korean religions Korea 
Caodaism 5–9 Vietnamese religions Vietnam, 20th century 
Bahá'í Faith 5–7.3 Abrahamic religions Iran, 19th century 
Tenriism 5 Japanese religions Japan, 19th century 
Jainism 4 Indian religions (Dharmic) Indian subcontinent, 7th to 9th century BC 
Cheondoism 3–4 Korean religions Korea, 19th century 
Hoahaoism 1.5–3 Vietnamese religions Vietnam, 20th century