Union County, South Dakota has 14 churches in the Churches List directory, 0 of them verified and 3 with a published website. The 2020 US Religion Census counted 28 congregations and 5,629 adherents across 11 religious bodies in the county. That is 335 adherents per 1,000 residents of its 16,818 people.
| Religious body | Congregations | Adherents | Per 1,000 pop. |
|---|---|---|---|
| Evangelical Lutheran Church in America | 7 | 2,187 | 130.0 |
| Catholic Church | 4 | 1,889 | 112.3 |
| United Methodist Church | 3 | 385 | 22.9 |
| United Church of Christ | 3 | 365 | 21.7 |
| Lutheran Church--Missouri Synod | 2 | 351 | 20.9 |
| Non-denominational Christian Churches | 4 | 320 | 19.0 |
| Southern Baptist Convention | 1 | 80 | 4.8 |
| Nationwide Fellowship Mennonite Churches | 1 | 51 | 3.0 |
| Baha'i Faith USA | 0 | 1 | 0.1 |
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 (16,818). Largest 12 bodies by adherents shown.
Services, Sept.-May 10:15 AM Summer Hours: 9 AMa union church of what was once two separate United Methodist and United Church of Christ churches
Directory traditions here: Baptist Churches (4) · Lutheran (4) · Methodist (2) · Catholic (2) · Non-Denominational (1) · United Church of Christ (1)
Directory listings are mapped to Union 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.