35% of U.S. adults no longer identify with the religion in which they were raised – that’s about 90 million people who have changed their religious identities.
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.
This section describes the methods used to estimate religious composition at the country level, regionally and globally; our procedures for measuring religious groups’ demographic characteristics and their religious “switching” rates; as well as methodological challenges that we considered in some countries. The final section lists the 201 countries and territories that make up each of […]
After years of decline, the U.S. Christian share has been relatively stable since 2019, while the rise in the share of religious “nones” has slowed – at least for now.