Fremont County, Iowa has 18 churches in the Churches List directory, 1 of them verified and 2 with a published website. The 2020 US Religion Census counted 20 congregations and 2,079 adherents across 10 religious bodies in the county. That is 315 adherents per 1,000 residents of its 6,600 people.
| Religious body | Congregations | Adherents | Per 1,000 pop. |
|---|---|---|---|
| United Methodist Church | 7 | 583 | 88.3 |
| Catholic Church | 2 | 545 | 82.6 |
| Christian Churches and Churches of Christ | 1 | 288 | 43.6 |
| United Church of Christ | 3 | 224 | 33.9 |
| Evangelical Lutheran Church in America | 1 | 100 | 15.2 |
| Non-denominational Christian Churches | 1 | 100 | 15.2 |
| Presbyterian Church (U.S.A.) | 2 | 92 | 13.9 |
| Church of the Nazarene | 1 | 90 | 13.6 |
| Assemblies of God | 1 | 43 | 6.5 |
| American Baptist Churches in the USA | 1 | 14 | 2.1 |
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 (6,600). Largest 12 bodies by adherents shown.
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Directory traditions here: United Methodist (4) · Church of Christ (2) · Catholic (2) · Baptist Churches (1) · Assemblies of God (1) · Methodist (1) · Congregational (1) · Evangelical (1) · Church of the Nazarene (1) · Non-Denominational (1)
Directory listings are mapped to Fremont 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.