Christianity and Islam together claim more than half of humanity
The world's two largest faiths account for over half of everyone alive.
As of 2020, Christianity was the world’s largest religion with about 2.3 billion adherents — roughly 28.8% of the global population. Islam ranked second with around 1.9 billion Muslims, or 25.6%.
Together the two faiths accounted for more than 54% of all people on Earth, a combined share larger than every other religious group — and the religiously unaffiliated — put together.
No other single religion comes close: the next-largest organized faith, Hinduism, trails well behind the top two.
The balance between them is shifting. Between 2010 and 2020 the number of Muslims grew by 347 million — more than the growth of all other religions combined — while Christianity, though it added 122 million followers, slipped 1.8 percentage points as a share of humanity.
Sources & references
2 referencesWell-established. Corroborated by 2 independent sources.
