2. Christian population change
Christians remain the largest religious group. But they’re shrinking as a share of the global population, as many Christians are leaving religion altogether.
Numbers, Facts and Trends Shaping Your World
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5. Religious importance and religious affiliation
By some measures, the world’s most religious countries are mostly in the Middle East, South and Southeast Asia, sub-Saharan Africa and Latin America.
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Acknowledgments
Pew Research Center is a subsidiary of The Pew Charitable Trusts, its primary funder. This report is a collaborative effort based on the input and analysis of the following individuals. Find related reports online at pewresearch.org/religion. This report includes new analysis of data from the 2023-24 U.S. Religious Landscape Study. The RLS was made possible […]
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15. Why we revised our estimates for 2010
Read how Pew Research Center revised our estimates to reflect methodological advances, incorporate newly available data, and allow comparison across measures in this report.
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6. Religion, fertility and child-rearing
Read about how adults’ average number of kids vary by religious group, and how many parents pray with their kids, opt for a religious education and more. Religious Landscape Study by Pew Research Center.
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1. What do religious ‘nones’ believe?
Many religious “nones,” which include atheists and agnostics, hold religious and spiritual beliefs in the 22 countries studied. Read about belief in spirits and God, as well as differences by gender.
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6. Buddhist population change
Buddhism is the only major religion that declined in number globally between 2010 and 2020, mostly due to religious disaffiliation in East Asia and to low birth rates.
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18. Religion and views on immigration and diversity
Across religious groups, majorities see America’s openness to others as essential to national identity. But views on rising immigration are more mixed. Religious Landscape Study by Pew Research Center.
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Spirituality and Religion: How Does the U.S. Compare With Other Countries?
Explore how adults in the U.S. and 35 other countries compare religiously and spiritually when it comes to affiliation, prayer, afterlife beliefs and more.
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21. Religion and views of right and wrong
Most U.S. adults say whether something is right or wrong often depends on the situation (55%), and that you can be moral without believing in God (68%). Religious Landscape Study by Pew Research Center.
