Oswego County, New York has 150 churches in the Churches List directory, 2 of them verified and 32 with a published website. The 2020 US Religion Census counted 131 congregations and 42,626 adherents across 31 religious bodies in the county. That is 363 adherents per 1,000 residents of its 117,528 people.
| Religious body | Congregations | Adherents | Per 1,000 pop. |
|---|---|---|---|
| Catholic Church | 13 | 27,519 | 234.1 |
| United Methodist Church | 30 | 5,458 | 46.4 |
| Non-denominational Christian Churches | 15 | 2,890 | 24.6 |
| Church of Jesus Christ of Latter-day Saints | 2 | 1,332 | 11.3 |
| Christian and Missionary Alliance | 3 | 673 | 5.7 |
| Wesleyan Church | 4 | 584 | 5.0 |
| Jehovah's Witnesses | 2 | 550 | 4.7 |
| United Church of Christ | 6 | 453 | 3.9 |
| American Baptist Churches in the USA | 6 | 405 | 3.4 |
| Amish Groups, undifferentiated | 3 | 404 | 3.4 |
| Evangelical Lutheran Church in America | 2 | 320 | 2.7 |
| Assemblies of God | 5 | 303 | 2.6 |
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 (117,528). Largest 12 bodies by adherents shown.
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Directory traditions here: Methodist (36) · Catholic (25) · Baptist Churches (17) · United Methodist (9) · Episcopal (6) · United Church of Christ (6) · Non-Denominational (6) · Presbyterian (5) · Seventh Day Adventist (5) · Wesleyan (4)
Directory listings are mapped to Oswego 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.