Islam was the world’s fastest-growing religion from 2010 to 2020
From 2010 to 2020, the number of Muslims increased by 347 million people to 2.0 billion people.
Numbers, Facts and Trends Shaping Your World
Size & Demographic Characteristics of Religious Groups
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Size & Demographic Characteristics of Religious Groups
Publications
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How the Global Religious Landscape Changed From 2010 to 2020
Christians remain the largest religious group, and Muslims grew the fastest from 2010 to 2020. Read how the global share of Buddhists, Hindus, Jews and the religiously unaffiliated changed.
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Religious Composition by Country, 2010-2020
Find how many people identify with each religious group and what percent each made up in 201 countries and territories, and by region, in 2010 and 2020.
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Around the World, Many People Are Leaving Their Childhood Religions
In many places surveyed, 20% or more of all adults have left their childhood religious group. Christianity and Buddhism have had especially large losses.
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10 facts about U.S. Catholics
Catholics are one of the largest religious groups in the United States, outnumbering any single Protestant denomination.
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The Religious Composition of the World’s Migrants
The globe’s 280 million immigrants shape countries’ religious composition. Christians make up the largest share, but Jews are most likely to have migrated.
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Religious composition of the world’s migrants, 1990-2020
Explore our interactive table showing the religious composition of immigrants around the globe and how it’s changed from 1990 to 2020.
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8 facts about atheists
Around six-in-ten U.S. atheists are men (64%). And seven-in-ten are ages 49 or younger, compared with about half of U.S. adults overall (52%).
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Has the rise of religious ‘nones’ come to an end in the U.S.?
Although it’s possible that the “nones” have leveled off, it’s also possible that their growth has continued, but at a gradual pace that is difficult to see in the data.
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7 facts about Hindus around the world
With Diwali celebrations underway, here are some facts about Hindus around the world.
