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.
Numbers, Facts and Trends Shaping Your World
The American Trends Panel survey methodology Overview Data in this report comes from Wave 177 of the American Trends Panel (ATP), Pew Research Center’s nationally representative panel of randomly selected U.S. adults. The survey was conducted from Aug. 18 to 24, 2025. A total of 5,153 panelists responded out of 5,525 who were sampled, for […]