Jefferson County

Jefferson County is an administrative county in southeastern Idaho covering roughly 1,106 square miles with mountains, river valleys, and farmland. Rigby serves as the county seat, providing government offices, schools, and community services to residents across the area.

The county was established in 1913 and named after Thomas Jefferson as communities grew around transportation routes. These connections helped the area develop through links to major trading paths in the region.

The area reflects deep roots in farming, with families working the land across generations and shaping how the community operates. This connection to agriculture is visible in the patterns of settlement and the rhythm of local life throughout the region.

The area is sparsely populated with Rigby as the main hub for services and shopping. Visitors should expect longer distances between towns and plan ahead to locate specific services or amenities.

Three separate school districts operate within the county, each serving different communities across rural and urban areas. This arrangement allows each district to tailor education to the specific needs of their local students.

Location: Idaho

Inception: February 18, 1913

Capital city: Rigby

Shares border with: Clark County, Bingham County, Butte County, Bonneville County, Madison County, Fremont County

Website: http://co.jefferson.id.us

GPS coordinates: 43.82000,-112.31000

Latest update: December 10, 2025 15:54