Pew Research Center reports and data on the world’s largest religious group.
Christians make up about the same proportion of the world’s population today as they did a century ago, but there has been a momentous shift in where they live.
The Shifting Global Catholic Population
Catholics have made up a remarkably stable share of the global population over the past century, but their geographic distribution has shifted significantly during that time.
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 in Latin America
Nearly 40% of the world’s Catholics live in Latin America, but many people in the region have converted from Catholicism to Protestantism, while some have left organized religion altogether.
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Mormons more likely to marry, have more children than other U.S. religious groups
Two-thirds (66%) of U.S. Mormon adults are currently married, down slightly from 71% in 2007 – but still high compared with current rates among Christians overall (52%) and U.S. adults overall (48%).
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.
Mainline Protestants make up shrinking number of U.S. adults
In recent years, the share of Americans who identify with mainline Protestantism has been shrinking significantly, a trend driven partly by generational change.
Compared with other Christian groups, evangelicals’ dropoff is less steep
One big reason evangelical Protestants have not declined at the same rate as other major Christian groups is that they are gaining new converts at a greater rate than they are losing people who were raised in the tradition.
5 key findings about the changing U.S. religious landscape
Christians are declining, both as a share of the U.S. population and in total number, while religious “nones” continue to rise.
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.
Religious Landscape Study
Explore the geographic distribution and demographics of America’s major religious groups.
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.
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.
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.