Da https://www.pewforum.org/

About Three-in-Ten U.S. Adults Are Now Religiously Unaffiliated

Self-identified Christians make up 63% of U.S. population in 2021, down from 75% a decade ago

“The secularizing shifts evident in American society so far in the 21st century show no signs of slowing. The latest Pew Research Center survey of the religious composition of the United States finds the religiously unaffiliated share of the public is 6 percentage points higher than it was five years ago and 10 points higher than a decade ago…”

PEW RESEARCH CENTER