Lake County, South Dakota has 30 churches in the Churches List directory, 0 of them verified and 1 with a published website. The 2020 US Religion Census counted 28 congregations and 6,626 adherents across 18 religious bodies in the county. That is 599 adherents per 1,000 residents of its 11,067 people.
| Religious body | Congregations | Adherents | Per 1,000 pop. |
|---|---|---|---|
| Evangelical Lutheran Church in America | 3 | 2,719 | 245.7 |
| Catholic Church | 2 | 1,519 | 137.3 |
| United Methodist Church | 2 | 509 | 46.0 |
| Lutheran Church--Missouri Synod | 2 | 483 | 43.6 |
| Non-denominational Christian Churches | 4 | 430 | 38.9 |
| Church of Jesus Christ of Latter-day Saints | 1 | 231 | 20.9 |
| Schmiedeleut Hutterite Group 2 | 2 | 230 | 20.8 |
| Presbyterian Church (U.S.A.) | 2 | 121 | 10.9 |
| Wesleyan Church | 1 | 112 | 10.1 |
| Association of Free Lutheran Congregations | 1 | 67 | 6.1 |
| United Church of Christ | 1 | 65 | 5.9 |
| American Baptist Churches in the USA | 1 | 57 | 5.2 |
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 (11,067). Largest 12 bodies by adherents shown.
Directory traditions here: Catholic (8) · Lutheran (7) · Baptist Churches (3) · United Methodist (2) · Methodist (1) · Congregational (1) · Episcopal (1) · Evangelical (1) · Seventh Day Adventist (1) · Non-Denominational (1)
Directory listings are mapped to Lake 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.