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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.

Jerome County, Idaho

Jerome County History, Geography, and Demographics

County Seat: Jerome
Year Organized: 1919
Square Miles: 600
Court House:

300 N. Lincoln Avenue
County Courthouse
Jerome, ID 83338-2344

Etymology - Origin of County Name

Jerome County is named for either Jerome Hill, Jerome Kuhn or Jerome Kuhn, Jr., three related local leaders important to the county.


County QuickFacts: Census Bureau Quick Facts

County History

Established February 8, 1919 with its county seat at Jerome. Three sources for the name are commonly given: Jerome Hill, one of the developers of the North Side Irrigation Project; his grandson, Jerome Kuhn, Jr.; or his son-in-law, Jerome Kuhn. All were important to the growth of the county.

Neighboring Counties:

  • Northeast: Lincoln County; Minidoka County
  • Southeast: Cassia County
  • Southwest: Twin Falls County
  • Northwest: Gooding County

Cities and Towns:

- Eden city Incorporated Area
- Hazelton city Incorporated Area
- Jerome (County Seat) 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!"