St. Mary Parish, Louisiana has 75 churches in the Churches List directory, 0 of them verified and 16 with a published website. The 2020 US Religion Census counted 91 congregations and 30,326 adherents across 18 religious bodies in the county. That is 614 adherents per 1,000 residents of its 49,398 people.
| Religious body | Congregations | Adherents | Per 1,000 pop. |
|---|---|---|---|
| Catholic Church | 17 | 14,264 | 288.8 |
| Southern Baptist Convention | 15 | 5,098 | 103.2 |
| Non-denominational Christian Churches | 20 | 4,584 | 92.8 |
| Full Gospel Christian Assemblies International | 3 | 1,650 | 33.4 |
| United Methodist Church | 10 | 1,508 | 30.5 |
| Assemblies of God | 3 | 805 | 16.3 |
| African Methodist Episcopal Church | 3 | 504 | 10.2 |
| Church of God in Christ | 3 | 478 | 9.7 |
| Jehovah's Witnesses | 2 | 414 | 8.4 |
| Church of Jesus Christ of Latter-day Saints | 1 | 395 | 8.0 |
| Full Gospel Baptist Church Fellowship | 2 | 200 | 4.0 |
| Churches of Christ | 3 | 182 | 3.7 |
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 (49,398). Largest 12 bodies by adherents shown.
Directory traditions here: Baptist Churches (24) · Catholic (16) · Non-Denominational (8) · Methodist (5) · Church of God in Christ (4) · United Methodist (4) · Pentecostal (3) · Episcopal (2) · Church of Christ (2) · Assemblies of God (2)
Directory listings are mapped to St. Mary Parish 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.