Jefferson County, Idaho has 15 churches in the Churches List directory, 0 of them verified and 0 with a published website. The 2020 US Religion Census counted 66 congregations and 27,270 adherents across 8 religious bodies in the county. That is 883 adherents per 1,000 residents of its 30,890 people.
| Religious body | Congregations | Adherents | Per 1,000 pop. |
|---|---|---|---|
| Church of Jesus Christ of Latter-day Saints | 58 | 25,230 | 816.8 |
| Catholic Church | 2 | 1,597 | 51.7 |
| Non-denominational Christian Churches | 1 | 150 | 4.9 |
| Lutheran Church--Missouri Synod | 1 | 111 | 3.6 |
| Southern Baptist Convention | 2 | 87 | 2.8 |
| Presbyterian Church (U.S.A.) | 1 | 50 | 1.6 |
| American Baptist Churches in the USA | 1 | 38 | 1.2 |
| Baha'i Faith USA | 0 | 7 | 0.2 |
Source: 2020 US Religion Census (Association of Statisticians of American Religious Bodies). Per-1,000 rates divide reported adherents by the county's 2020 Census population (30,890). Largest 12 bodies by adherents shown.
Lutheran Church Missouri Synod
Directory traditions here: Church of Jesus Christ Of Latter Day Saints (9) · Baptist Churches (3) · Presbyterian (1) · Lutheran (1) · Community (1)
Directory listings are mapped to Jefferson County through the US Census Bureau's 2020 ZCTA-to-county relationship file: each ZIP Code Tabulation Area is assigned to the county holding the largest share of its land area, so a small number of churches in ZIP codes that straddle county lines may be attributed to a neighboring county. Congregation and adherent counts come from the 2020 US Religion Census and are reported by the religious bodies themselves. Population is the county's April 2020 decennial-census base from the US Census Bureau's population-estimates program; per-1,000 adherence rates divide reported adherents by that figure. Corrections to any listing go through the corrections page.