Butler County, Iowa has 46 churches in the Churches List directory, 0 of them verified and 12 with a published website. The 2020 US Religion Census counted 43 congregations and 6,538 adherents across 19 religious bodies in the county. That is 456 adherents per 1,000 residents of its 14,335 people.
| Religious body | Congregations | Adherents | Per 1,000 pop. |
|---|---|---|---|
| Evangelical Lutheran Church in America | 4 | 2,274 | 158.6 |
| Reformed Church in America | 7 | 1,187 | 82.8 |
| United Methodist Church | 7 | 985 | 68.7 |
| United Church of Christ | 3 | 591 | 41.2 |
| Catholic Church | 2 | 407 | 28.4 |
| Conservative Congregational Christian Conference | 1 | 331 | 23.1 |
| Christian Reformed Church in North America | 2 | 218 | 15.2 |
| Lutheran Congregations in Mission for Christ | 1 | 198 | 13.8 |
| Christian Churches and Churches of Christ | 1 | 97 | 6.8 |
| National Association of Congregational Christian Churches | 1 | 86 | 6.0 |
| Presbyterian Church (U.S.A.) | 1 | 71 | 5.0 |
| Evangelical Lutheran Synod | 1 | 43 | 3.0 |
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 (14,335). Largest 12 bodies by adherents shown.
Directory traditions here: Methodist (8) · Lutheran (8) · Other Christian Services (6) · Baptist Churches (5) · Catholic (3) · Church of Christ (3) · United Methodist (3) · Evangelical (2) · Presbyterian (2) · Brethren (1)
Directory listings are mapped to Butler 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.