Churches in Ada County
Ada County, Idaho has 286 churches in the Churches List directory, 321 of them verified and 336 with a published website. The 2020 US Religion Census counted 404 congregations and 235,225 adherents across 70 religious bodies in the county. That is 475 adherents per 1,000 residents of its 494,961 people. It is one of the counties we index across Idaho, within the Boise City, ID metro area. Its largest listing centre is Boise.
Religious bodies in Ada County (2020 US Religion Census)
| Religious body | Congregations | Adherents | Per 1,000 pop. |
|---|---|---|---|
| Church of Jesus Christ of Latter-day Saints | 164 | 71,340 | 144.1 |
| Catholic Church | 7 | 67,703 | 136.8 |
| Non-denominational Christian Churches | 43 | 26,708 | 54.0 |
| United Methodist Church | 7 | 18,169 | 36.7 |
| Christian Churches and Churches of Christ | 7 | 9,927 | 20.1 |
| Church of the Nazarene | 8 | 6,132 | 12.4 |
| Jehovah's Witnesses | 18 | 4,056 | 8.2 |
| Assemblies of God | 12 | 3,921 | 7.9 |
| American Baptist Churches in the USA | 5 | 2,587 | 5.2 |
| Seventh-day Adventist Church | 8 | 2,500 | 5.1 |
| Episcopal Church | 4 | 2,388 | 4.8 |
| Southern Baptist Convention | 13 | 2,207 | 4.5 |
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 (494,961). Largest 12 bodies by adherents shown.
Historic-register churches in the county
Notable churches in Ada County
Meridian Idaho Temple
modern architecture
Boise Idaho Temple
Life Church
Life church is located in Boise, Idaho. This website includes not only information about the local church but many free audio and video messages.
YouTube
Rockharbor Church
Ten Mile Christian Church
Holy Apostles Catholic Church
St Mark's Catholic Church
Calvary Chapel
Calvary Chapel
YouTube
Vineyard Boise Christian Fellowship
"Vineyard Boise is a body of believers in the heart of Garden City that has been serving Boise since 1989. We are a non-denominational Christian church that pursues authentic Chris...
YouTube
№ 11
Cathedral of Saint John the Evangelist
Romanesque Revival architecture Diocese of Boise
№ 12
First Presbyterian Church.Boise
Cities and towns in Ada County
Directory traditions here: Unknown Denomination (64) Non-Denominational (60) Church of Jesus Christ Of Latter Day Saints (57) Baptist Churches (40) Christian (27) Catholic (18) Community (15) Lutheran (15) Church of the Nazarene (13) Assemblies of God (12)
Researching ancestors from Ada County?
Church registers are among the richest genealogical sources: baptisms, marriages, and burials often predate civil records. The FamilySearch catalog holds microfilmed church records for many Idaho counties, filed by denomination and parish name: search Ada County church records on FamilySearch (free account). Cross-reference with the historic-register churches above and the cemeteries listed on each church's page.
Disaster history of Ada County
FEMA has issued 6 disaster declarations covering Ada County since records began in 1953, most recently in 2020. The most frequent cause: biological (2 declarations). Churches have historically served as shelters and relief hubs in these events; congregations can register preparedness plans with their county emergency management agency.
Source: OpenFEMA Disaster Declarations Summaries.
How this county page is assembled
Directory listings are mapped to Ada 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.