A Sunday special
Gallup first asked in 1937, when 73% said they were members. It says membership stayed near 70% for the next six decades. Since 1999 it has fallen, while the share who name no religion has risen from 2% in 1948 to 24%.
2025: members 45%; at services in the past week 32%; no religion 24%
Gallup's yearly membership and attendance figures start in 1992.
Religious preference, 100 Americans
Gallup's table has no "Christian (nonspecific)" figure before 1999.
Membership, attendance and affiliation are three different questions; all three lines are Gallup's. Gallup first asked about membership in 1937 (its 2021 report); the saved tables have yearly figures from 1992. The years before 1992 are not yearly membership or attendance data, so the dotted line shows Gallup's own description, not data points. "No religion" is the share who answer "none" to religious preference. When 2025 is selected, the left grid shows 1948, the first year Gallup asked.
Gallup's table shows no "Christian (nonspecific)" figure before 1999 (n/a), so compare "Protestant" across 1999 with care. Gallup added Spanish-language interviews in 2011. These are surveys with a margin of error, not counts. Gallup and Pew are never combined on one line. The strip's squares are rounded to 100; the key shows Gallup's reported numbers. n/a means the answer is not in Gallup's table for that year. An asterisk in Gallup's table means under 1%.
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