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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.

Jefferson County, Idaho

Jefferson County History, Geography, and Demographics

County Seat: Rigby
Year Organized: 1913
Square Miles: 1,095
Court House:

210 Courthouse Way, Suite 100
County Courthouse
Rigby, ID 83442-5294

Etymology - Origin of County Name

Jefferson County is named for Thomas Jefferson (1743-1826), President of the United States from 1801 to 1809.


County QuickFacts: Census Bureau Quick Facts

County History

Established February 18, 1913 with its county seat at Rigby. Named for Thomas Jefferson, third president of the United States. The first settlers were Mormons who constructed irrigation systems.

Neighboring Counties:

  • North: Clark County
  • Northeast: Fremont County
  • East: Madison County
  • Southeast: Bonneville County
  • South: Bingham County
  • West: Butte County

Cities and Towns:

- Hamer city Incorporated Area
- Lewisville city Incorporated Area
- Menan city Incorporated Area
- Mud Lake city Incorporated Area
- Rigby (County Seat) city Incorporated Area
- Ririe city Incorporated Area
- Roberts city Incorporated Area

County Resources:

Enter County Resources and Information Here

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!"