America’s religious landscape,
in perspective.
Explore what’s changing, what’s holding steady, and what the surveys actually measure.
A dated research snapshot, with no automatic updates.
Religious identity over time
Percentage of U.S. adults · Pew Research
Measurement notes for selected series
Christian identification
Self-described present religion, classified across Christian traditions (question summary).
Broad identity categories are comparable in Pew’s bridge study. This is identification, not doctrinal agreement or church membership.
[1] Pew ResearchReligiously unaffiliated
Atheist, agnostic or nothing in particular, combined (question summary).
Unaffiliated does not mean atheist. Rounded subgroup shares may not add exactly to the total.
[1] Pew ResearchUnaffiliated · NPORS benchmark
Atheist, agnostic or nothing in particular (question summary).
Separate benchmark survey from the RLS. The published broad table combines some Christian traditions with other faiths, so no total Christian percentage is reconstructed here.
[4] Pew ResearchEach line stays within one survey series. Gaps mark major method changes; connecting lines guide the eye between observed points. Hover or focus a point for its survey date.
Belief, identity and participation are related, distinct dimensions. Compare definitions before comparing percentages.