Ontario County, New York has 136 churches in the Churches List directory, 0 of them verified and 52 with a published website. The 2020 US Religion Census counted 112 congregations and 48,776 adherents across 36 religious bodies in the county. That is 434 adherents per 1,000 residents of its 112,485 people.
| Religious body | Congregations | Adherents | Per 1,000 pop. |
|---|---|---|---|
| Catholic Church | 12 | 31,451 | 279.6 |
| United Methodist Church | 18 | 5,024 | 44.7 |
| Non-denominational Christian Churches | 11 | 1,910 | 17.0 |
| Presbyterian Church (U.S.A.) | 8 | 1,316 | 11.7 |
| Wesleyan Church | 2 | 1,246 | 11.1 |
| United Church of Christ | 6 | 1,200 | 10.7 |
| American Baptist Churches in the USA | 6 | 1,188 | 10.6 |
| Episcopal Church | 6 | 819 | 7.3 |
| Lutheran Church--Missouri Synod | 2 | 813 | 7.2 |
| Church of Jesus Christ of Latter-day Saints | 1 | 512 | 4.6 |
| Evangelical Lutheran Church in America | 2 | 456 | 4.1 |
| Salvation Army | 2 | 260 | 2.3 |
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 (112,485). Largest 12 bodies by adherents shown.
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Directory traditions here: Baptist Churches (22) · Catholic (16) · Non-Denominational (14) · United Methodist (12) · Methodist (12) · Episcopal (7) · United Church of Christ (6) · Presbyterian (6) · Lutheran (5) · Church of the Nazarene (3)
Directory listings are mapped to Ontario 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.