Walla Walla County, Washington has 89 churches in the Churches List directory, 4 of them verified and 23 with a published website. The 2020 US Religion Census counted 74 congregations and 25,019 adherents across 35 religious bodies in the county. That is 400 adherents per 1,000 residents of its 62,585 people.
| Religious body | Congregations | Adherents | Per 1,000 pop. |
|---|---|---|---|
| Seventh-day Adventist Church | 9 | 6,647 | 106.2 |
| Catholic Church | 4 | 6,300 | 100.7 |
| Church of Jesus Christ of Latter-day Saints | 8 | 4,200 | 67.1 |
| Non-denominational Christian Churches | 6 | 2,640 | 42.2 |
| Church of God (Anderson, Indiana) | 2 | 1,006 | 16.1 |
| Jehovah's Witnesses | 2 | 562 | 9.0 |
| Assemblies of God | 3 | 512 | 8.2 |
| United Methodist Church | 1 | 361 | 5.8 |
| Church of the Nazarene | 2 | 335 | 5.4 |
| Foursquare Gospel, International Church of the | 1 | 334 | 5.3 |
| Evangelical Lutheran Church in America | 1 | 321 | 5.1 |
| National Missionary Baptist Convention, Inc. | 2 | 250 | 4.0 |
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 (62,585). Largest 12 bodies by adherents shown.
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Directory traditions here: Baptist Churches (11) · Non-Denominational (11) · Seventh Day Adventist (10) · Catholic (6) · Presbyterian (4) · Christian (4) · Church of God (4) · Assemblies of God (3) · Lutheran (3) · Evangelical (3)
Directory listings are mapped to Walla Walla 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.