According to the Pew Forum on Religion & Public Life:
- Just more than half of the American population is Protestant
- Just less than a quarter are Catholic
- Another 3 percent are other Christian; e.g., Mormon, Jehovah’s Witness or Orthodox
- Just less than 2 percent are Jewish
- Buddhists, Hindu, Muslim and other world religions account collectively for nearly 2 percent
- Other faiths such as Unitarian, New Age or Native American account for about 1 percent
- About 12 percent of Americans claim to be unaffiliated — half of these say religion is important, half say it is not
- And 4 percent are non-believers
Other slices.
- Roughly 10% of all Americans are former Catholics
- 28% of the population has left the faith of their childhood for another religion – or none at all (44% if you count intra-Protestant changes)
- 25% of 18-29 year olds say they are unaffiliated