Hardin County, Ohio has 74 churches in the Churches List directory, 1 of them verified and 14 with a published website. The 2020 US Religion Census counted 71 congregations and 9,456 adherents across 26 religious bodies in the county. That is 308 adherents per 1,000 residents of its 30,690 people.
| Religious body | Congregations | Adherents | Per 1,000 pop. |
|---|---|---|---|
| United Methodist Church | 18 | 2,330 | 75.9 |
| United Church of Christ | 4 | 1,382 | 45.0 |
| Amish Groups, undifferentiated | 9 | 1,051 | 34.2 |
| Catholic Church | 2 | 1,022 | 33.3 |
| Non-denominational Christian Churches | 7 | 820 | 26.7 |
| Christian Churches and Churches of Christ | 4 | 549 | 17.9 |
| Evangelical Lutheran Church in America | 3 | 420 | 13.7 |
| Assemblies of God | 2 | 385 | 12.5 |
| Jehovah's Witnesses | 1 | 264 | 8.6 |
| Church of the Nazarene | 1 | 200 | 6.5 |
| Eastern Pennsylvania Mennonite Church | 1 | 172 | 5.6 |
| Christian and Missionary Alliance | 1 | 169 | 5.5 |
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 (30,690). Largest 12 bodies by adherents shown.
Directory traditions here: Methodist (14) · Baptist Churches (10) · Presbyterian (7) · Church of Christ (7) · Non-Denominational (6) · United Methodist (5) · Assemblies of God (3) · United Church of Christ (3) · Lutheran (3) · Church of God (3)
Directory listings are mapped to Hardin 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.