Big Horn County, Montana has 17 churches in the Churches List directory, 2 of them verified and 8 with a published website. The 2020 US Religion Census counted 42 congregations and 4,941 adherents across 24 religious bodies in the county. That is 376 adherents per 1,000 residents of its 13,125 people.
| Religious body | Congregations | Adherents | Per 1,000 pop. |
|---|---|---|---|
| Catholic Church | 7 | 2,733 | 208.2 |
| American Baptist Churches in the USA | 4 | 381 | 29.0 |
| Non-denominational Christian Churches | 4 | 340 | 25.9 |
| Conservative Congregational Christian Conference | 1 | 238 | 18.1 |
| Church of Jesus Christ of Latter-day Saints | 1 | 210 | 16.0 |
| Southern Baptist Convention | 2 | 204 | 15.5 |
| Lutheran Church--Missouri Synod | 2 | 149 | 11.4 |
| Jehovah's Witnesses | 1 | 120 | 9.1 |
| Church of Christ, Mennonite | 1 | 105 | 8.0 |
| Church of God in Christ | 1 | 76 | 5.8 |
| Assemblies of God | 2 | 72 | 5.5 |
| Mennonite Church USA | 1 | 71 | 5.4 |
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 (13,125). Largest 12 bodies by adherents shown.
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Directory traditions here: Catholic (6) · Baptist Churches (2) · Lutheran (1) · United Methodist (1) · Evangelical (1) · Bible (1) · Seventh Day Adventist (1) · Mennonite (1) · Apostolic (1) · Foursquare (1)
Directory listings are mapped to Big Horn 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.