Lewis County, New York has 53 churches in the Churches List directory, 0 of them verified and 17 with a published website. The 2020 US Religion Census counted 55 congregations and 12,162 adherents across 19 religious bodies in the county. That is 457 adherents per 1,000 residents of its 26,587 people.
| Religious body | Congregations | Adherents | Per 1,000 pop. |
|---|---|---|---|
| Catholic Church | 10 | 6,594 | 248.0 |
| Non-denominational Christian Churches | 7 | 1,930 | 72.6 |
| Conservative Mennonite Conference | 4 | 797 | 30.0 |
| United Methodist Church | 9 | 700 | 26.3 |
| Mennonite Church USA | 3 | 599 | 22.5 |
| Amish Groups, undifferentiated | 3 | 262 | 9.9 |
| Church of Jesus Christ of Latter-day Saints | 1 | 256 | 9.6 |
| Eastern Pennsylvania Mennonite Church | 1 | 214 | 8.0 |
| Presbyterian Church (U.S.A.) | 2 | 159 | 6.0 |
| Episcopal Church | 4 | 115 | 4.3 |
| Church of the Nazarene | 1 | 110 | 4.1 |
| United Church of Christ | 3 | 102 | 3.8 |
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 (26,587). Largest 12 bodies by adherents shown.
Directory traditions here: Catholic (14) · Methodist (7) · Mennonite (4) · Baptist Churches (4) · Episcopal (4) · Church of the Nazarene (3) · Non-Denominational (2) · Presbyterian (2) · Other Christian Services (2) · Seventh Day Adventist (2)
Directory listings are mapped to Lewis 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.