Alexander County, Illinois has 22 churches in the Churches List directory, 0 of them verified and 2 with a published website. The 2020 US Religion Census counted 25 congregations and 2,259 adherents across 14 religious bodies in the county. That is 431 adherents per 1,000 residents of its 5,239 people.
| Religious body | Congregations | Adherents | Per 1,000 pop. |
|---|---|---|---|
| Southern Baptist Convention | 8 | 842 | 160.7 |
| National Missionary Baptist Convention, Inc. | 4 | 400 | 76.4 |
| American Baptist Churches in the USA | 1 | 330 | 63.0 |
| United Methodist Church | 3 | 135 | 25.8 |
| Jehovah's Witnesses | 1 | 114 | 21.8 |
| Church of God in Christ | 1 | 100 | 19.1 |
| National Association of Free Will Baptists | 1 | 93 | 17.8 |
| Catholic Church | 1 | 75 | 14.3 |
| Assemblies of God | 1 | 65 | 12.4 |
| Episcopal Church | 1 | 47 | 9.0 |
| Baha'i Faith USA | 0 | 37 | 7.1 |
| Seventh-day Adventist Church | 1 | 11 | 2.1 |
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 (5,239). Largest 12 bodies by adherents shown.
Directory traditions here: Baptist Churches (7) · Methodist (5) · Church of God (2) · Episcopal (1) · Catholic (1) · United Methodist (1) · Church of Christ (1) · Presbyterian (1) · Seventh Day Adventist (1) · Assemblies of God (1)
Directory listings are mapped to Alexander 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.