Share of U.S. adults by faith segment
Percent of the U.S. adult population, 2004 (in percent)
Key finding
Highest: Born again Christians (40%). Lowest: Atheists, agnostics and non-Christian faith adherents (21%).
- Born again Christians: 40%
- Notional Christians: 39%
- Atheists, agnostics and non-Christian faith adherents: 21%
Source: Barna Group, Annual Barna Group Survey Describes Changes in America’s Religious Beliefs and Practices · Barna Group annual survey; margin of sampling error plus or minus 3.2 percentage points at the 95% confidence level. Article published 2024-01-08.
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Questions about this statistic
What does this statistic show?
Highest: Born again Christians (40%). Lowest: Atheists, agnostics and non-Christian faith adherents (21%). Born again Christians: 40%. Notional Christians: 39%. Atheists, agnostics and non-Christian faith adherents: 21%.
Who published this data?
Barna Group, 2004. Source: Barna Group, Annual Barna Group Survey Describes Changes in America’s Religious Beliefs and Practices (https://www.barna.com/research/annual-barna-group-survey-describes-changes-in-americas-religious-beliefs-and-practices/).
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More Belief & Culture statistics
- Age at which people switched religious identification Lifeway Research, 2026
- Americans' views of Pope Leo XIV Public Religion Research Institute, 2026
- Americans who at least somewhat believe calling is a spiritual experience American Bible Society, 2026
- Adults who are born again, by race Barna Group, 2004
- Adults with a biblical worldview Barna Group, 2003
About this data
Leader Insights collects statistics about U.S. churches from published research by organizations such as Lifeway Research, Barna Group, Springtide, the American Bible Society and PRRI. Every number is checked against the wording of the original source before it is published, and each statistic links back to the study it came from. Figures are reproduced from the publishers named above; see the source for full methodology.