Lyon County, Iowa has 33 churches in the Churches List directory, 0 of them verified and 11 with a published website. The 2020 US Religion Census counted 36 congregations and 7,832 adherents across 21 religious bodies in the county. That is 656 adherents per 1,000 residents of its 11,936 people.
| Religious body | Congregations | Adherents | Per 1,000 pop. |
|---|---|---|---|
| Reformed Church in America | 7 | 2,376 | 199.1 |
| Evangelical Lutheran Church in America | 3 | 993 | 83.2 |
| Catholic Church | 2 | 840 | 70.4 |
| Apostolic Christian Church of America | 1 | 640 | 53.6 |
| Christian Reformed Church in North America | 2 | 492 | 41.2 |
| Non-denominational Christian Churches | 1 | 400 | 33.5 |
| United Methodist Church | 2 | 378 | 31.7 |
| Presbyterian Church (U.S.A.) | 2 | 369 | 30.9 |
| Lutheran Church--Missouri Synod | 2 | 318 | 26.6 |
| United Reformed Churches in North America | 1 | 255 | 21.4 |
| Apostolic Christian Faith | 1 | 200 | 16.8 |
| Protestant Reformed Churches in America | 1 | 190 | 15.9 |
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 (11,936). Largest 12 bodies by adherents shown.
Directory traditions here: Lutheran (5) · Other Christian Services (5) · Baptist Churches (4) · Methodist (4) · Reformed Church in America (3) · Catholic (2) · Presbyterian (2) · Christian (2) · United Methodist (2) · Evangelical (2)
Directory listings are mapped to Lyon 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.