Nez Perce County, Idaho Genealogy Records

Selected record inventories for Nez Perce County, their listed years, and where to ask for access.

Selected inventory review: 2026-11-02. Selected repository catalog metadata reviewed. This is not a complete holdings audit or certification of current access. See the repository note for limitations. Official repository catalog or holdings guide

Formed
1861
County seat
Lewiston
Clearwater CountyIdaho CountyLatah CountyLewis CountyNez Perce CountyIdahoLatahNez Perce
Nez Perce CountyToday's boundaries · U.S. Census Bureau

Listed record inventories

Selected holdings and indexes for Nez Perce County, checked against the repository descriptions linked below. Date spans may contain gaps; an index is not a complete set of original records.

Naturalization records

Court records

See the repository's descriptions and search options

Repository access note: Selected Idaho State Archives county microfilm holdings, grouped by series description. Date envelopes combine listed film segments and may contain gaps. These are film holdings, not a claim of online images. Consult the linked inventory for roll, item, volume and exact dates. Historic Alturas County items were not reassigned to present-day counties.

Sources: the catalogs and repository descriptions linked on the entries above. Selected inventories do not establish complete coverage of every record type or online access to original documents. Read the repository access note for source dates and limitations.

Where to find the records

Offices change their hours and access rules; call before you visit.

Boundaries and parent counties

Formed from: Missoula County (Mont.), Shoshone County, Spokane County (extinct)

Check the parent county for earlier records: Shoshone County

Later formed partly from Nez Perce County: Clearwater County, Latah County, Lewis County

Missoula (Mont.)Spokane (Wash. Terr., orig., extinct)ShoshoneNez PerceNez PerceMissoula (Mont.)Spokane (Wash. Terr., orig., extinct)Shoshone
Nez Perce as created in 1861Where its land was the day beforeToday's boundaryBoundaries: Newberry Library, Atlas of Historical County Boundaries

Records stay with the county that created them. If your ancestor lived here before 1861, search the parent county. The Atlas of Historical County Boundaries shows each boundary change.

Research tip

Idaho began statewide registration of births and deaths in 1911. Before 1863 its land was part of Oregon and Washington territories (the east also of Nebraska and Dakota territories), and some early settlers in the southeast recorded events in Cache County, Utah, thinking they lived there.