Direct answer · reviewed September 2026

What is the largest religion in the world?

Christianity is the world's largest religion, with about 2.6 billion adherents — roughly 32% of humanity. Islam is second, at about 2.0 billion (25%).

Christians2.6 billion
Muslims2.0 billion
Hindus1.1 billion
Non-religious1.0 billion
01

The world's religions by size

Rounded estimates of religious identification, not active practice. "Non-religious" combines agnostics and atheists. Shares do not total exactly because of rounding.

Religious identification worldwide (rounded)
ReligionAdherentsShare of world population
Christians2.6 billion32%
Muslims2.0 billion25%
Hindus1.1 billion14%
Non-religious1.0 billion12%
Buddhists550 million7%
Folk and ethnic religions450 million5%
Other300 million4%
FAQ

Related questions

What percentage of the world is Christian?

About 32%, or roughly one in three people.