Blaine County, Idaho Genealogy Records

Selected record inventories for Blaine 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
1895
County seat
Hailey
Ada CountyAdams CountyBannock CountyBear Lake CountyBingham CountyBoise CountyBonneville CountyButte CountyCamas CountyCanyon CountyCaribou CountyCassia CountyClark CountyCuster CountyElmore CountyFranklin CountyFremont CountyGem CountyGooding CountyJefferson CountyJerome CountyLemhi CountyLincoln CountyMadison CountyMinidoka CountyOneida CountyOwyhee CountyPayette CountyPower CountyTwin Falls CountyValley CountyWashington CountyBlaine CountyAdaAdamsBannockBinghamBoiseBonnevilleCaribouCassiaCusterElmoreGemJeffersonOneidaOwyheeTwin FallsValleyBlaine
Blaine CountyToday's boundaries · U.S. Census Bureau

Listed record inventories

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

Land 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: Alturas County (extinct), Logan County (extinct)

Later formed partly from Blaine County: Butte County, Camas County, Lincoln County, Power County

OwyheeCassiaOneidaElmoreCusterLemhiBoiseAdaBannockBinghamFremontIdahoLogan (extinct)Alturas (extinct)BlaineBlaineOwyheeCassiaOneidaElmoreBoiseAdaBannockBinghamFremont
Blaine as created in 1895Where 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 1895, 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.