An extensive new survey by the Pew Forum on Religion & Public Life details statistics on religion in America and explores the shifts taking place in the U.S. religious landscape. Based on interviews with more than 35,000 Americans age 18 and older, the U.S. Religious Landscape Survey finds that religious affiliation in the U.S. is both very diverse and extremely fluid.
Although there are about half as many Catholics in the U.S. as Protestants, the number of Catholics nearly rivals the number of members of evangelical Protestant churches and far exceeds the number of members of both mainline Protestant churches and historically black Protestant churches. The U.S. also includes a significant number of members of the third major branch of global Christianity – Orthodoxy – whose adherents now account for 0.6% of the U.S. adult population. American Christianity also includes sizeable numbers of Mormons (1.7% of the adult population), Jehovah’s Witnesses (0.7%) and other Christian groups (0.3%).
- Among people who are married, nearly four-in-ten (37%) are married to a spouse with a different religious affiliation. (This figure includes Protestants who are married to another Protestant from a different denominational family, such as a Baptist who is married to a Methodist.) Hindus and Mormons are the most likely to be married (78% and 71%, respectively) and to be married to someone of the same religion (90% and 83%, respectively).
- Mormons and Muslims are the groups with the largest families; more than one-in-five Mormon adults and 15% of Muslim adults in the U.S. have three or more children living at home.