Nation About 30% of American adults are now religiously unaffiliated, Pew Research study finds December 14, 2021Celina Tebor, USA TODAYComments Off on About 30% of American adults are now religiously unaffiliated, Pew Research study finds About three in ten American adults now self-identify as religiously unaffiliated, a new study released Tuesday from the Pew Research Center found.