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Idaho Counties

There are44 Counties in Idaho.
Counties are the largest political divisions within the state.

When Idaho became a territory in March, 1863, there were four Counties in existence: Boise, Idaho, Nez Perce and Shoshone. By the time Idaho became a state 27 years later, there were 15 counties. The rest of the 44 Counties came into existence during the 30 years after Idaho became a state. Two of the former Counties disappeared during this time. Alturas, which was created in 1864, was later divided into the many Counties now found in central Idaho. Logan County was only in existence for six years, from 1889 to 1895. It was combined with Alturas to form Blaine County and Lincoln County, which was formed just two weeks after Logan lost its identity.


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Bonneville County, Idaho

Bonneville County History, Geography, and Demographics

County Seat: Idaho Falls
Year Organized: 1911
Square Miles: 1,869
Court House:

605 N. Capital Ave
County Courthouse
Idaho Falls, ID 83402-3582

Etymology - Origin of County Name

Bonneville County is named for Captain Benjamin Louis Eulalie de Bonneville, a French-born United States Army officer who explored the area in the 1830s.

Demographics:

County QuickFacts: Census Bureau Quick Facts

County History

Established February 7, 1911 by the state legislature from the north and east parts of Bingham County. Named for Captain B. L. E. Bonneville, of the U. S. Army, who explored throughout the Snake River area in the 1830s. A settlement developed at the site of 1864, this settlement was known as Idaho Falls after 1891.

Neighboring Counties:

  • North: Jefferson County; Madison County; Teton County
  • East: Teton County, Wyo.; Lincoln County, Wyo.
  • South: Caribou County
  • Southwest: Bingham County
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County Resources
Counties: US Map
The history of our nation was a prolonged struggle to define the relative roles and powers of our governments: federal, state, and local. And the names given the counties, our most locally based jurisdictions, reflects the "characteristic features of this country!"


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