Pew Research Center reports and data on the world’s fastest growing religious group.

Fact Tank May. 19, 2015

Growing share of U.S. immigrants have no religious affiliation

One-in-five immigrants identified themselves as unaffiliated in 2014, an increase of 4 percentage points from the 16% who said so in 2007.

Religion May. 12, 2015

America’s Changing Religious Landscape

The Christian share of the U.S. population is declining, while the share of Americans who do not identify with any organized religion is growing. These changes affect all regions in the country and many demographic groups.

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Religion May. 12, 2015

Religious Landscape Study

Explore the geographic distribution and demographics of America’s major religious groups.

Fact Tank Apr. 23, 2015

Why Muslims are the world’s fastest-growing religious group

By 2050, they are expected to make up about three-in-ten of the world’s people, owing in part to relatively high fertility and low median age.

Fact Tank Apr. 21, 2015

By 2050, India to have world’s largest populations of Hindus and Muslims

India is projected to have 310 million Muslims (11% of the global total), making it the country with the largest population of Muslims in the world.

Fact Tank Apr. 15, 2015

Europe projected to retain its Christian majority, but religious minorities will grow

The number of Christians in Europe is forecast to drop by about 100 million by 2050, while the share of Muslims and smaller religious minorities will increase.

Fact Tank Apr. 14, 2015

Muslims expected to surpass Jews as second-largest U.S. religious group

If current demographic trends hold, by 2050, Muslims are projected to be more numerous in the U.S. than people who identify as Jewish on the basis of religion.

Religion Apr. 2, 2015

The Future of World Religions

If current demographic trends persist, Christians will remain steady, Muslims will grow and people with no religion will decline as a share of the world’s population in the coming decades.

Religion Apr. 2, 2015

Religious Composition by Country, 2010-2050

The religious profile of the world is rapidly changing, driven primarily by differences in fertility rates and the size of youth populations among the world’s major religions, as well as by people switching faiths. This table details the estimated religious composition of 198 countries and territories for 2010 to 2050.

Fact Tank Apr. 2, 2015

7 key changes in the global religious landscape

What will the world’s religious landscape look like a few decades from now?