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Boise Co. IDGenWeb Index  

ISU Digital Atlas, Boise County


Boise Co & neighbors
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  • Welcome to Boise County!

    This is a copy of the Jul 2017 version of Boise County IDGenWeb. The current version is available at

    NEW - - Boise County 1940 US Census , includes index, maps, and images

    Boise County is an original county, established February 4, 1864, with its county seat at Idaho City. It is the parent county to Ada, Washington, Adams, Payette, Canyon, Gem and parts of Valley Counties. Ada County, where Boise City is located, was the first to be split off later in 1864.

    Named for the Boise River, from the French word meaning "wooded;" fur trappers were in what is now known as Boise County as early as 1824.

    "Gold was discovered in the Boise Basin in 1862, and it was one of the richest gold mining districts in the nation. Its wealth helped develop the state politically and economically. Sawmills operated in the county in 1864, and after the mining boom subsided, lumber became an important industry. . . Idaho City at its peak in the 1860's abd 1870's had about 10,000 inhabitants and was for a time largest city in the northwest. . . Agriculture exists in some of the valleys, particularly at Horseshoe Bend and Garden Valley." - Idaho Almanac, 1977.

    The first post office in this part of the state was established at Placerville in 1863.

    Boundary Changes
    22 December 1864: Ada County created from a portion of Boise County
    20 February 1879: Washington County created from a portion of Boise County
    15 March 1915: Gem County created from portions of Boise County and Canyon County
    26 February 1917: Valley County created from a portion of Boise County

    Boise County as we know it today is largely mountainous timber, cut by the Payette River in the west and the north and the Boise River in the south. Over eighty percent of the county is public land.

    Towns and Communities

    Idaho City Garden Valley, Crouch & Lowman
    Garden Valley News blog
    Horseshoe Bend Placerville

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    If you have any Boise County related data, photos or web sites that you would like to have added to this site, please contact me. If you have access to records for the Boise County area and can perform lookups by request, we need you! Contact Reba McMillan, Boise County Coordinator.

    "I do statewide obituary look ups at the Idaho State Historical Library. They are open Wednesday through Saturday. They have on microfilm statewide newspapers dating back into the 1860's." Shawna True Carpender

    see also -- Books We Own - Lookup Service
    Cyndi's List of Lookup Services
    Random Acts of Genealogical Kindness

    Updated 16 July 2021   what's new

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