Minidoka County

Minidoka County is an administrative division in southern Idaho that stretches across irrigated farmlands in the south and natural lava beds in the north. The landscape shows the mark of water management systems that have shaped both its geography and how people use the land.

The county was established in 1913 after Lincoln County was divided, following completion of the Minidoka Dam in 1904. That irrigation project made the southern region economically viable and opened it for settlement.

The name Minidoka derives from Dakota Sioux language, meaning 'a fountain or spring of water,' first used in 1883 for a Union Pacific railway station.

The county seat of Rupert is where you can find government offices and administrative services. The town serves as the central hub for anyone needing local government support.

During World War II, Camp Rupert within the county operated as a prisoner of war facility. This wartime installation left an unexpected mark on the local story.

Location: Idaho

Inception: January 28, 1913

Capital city: Rupert

Shares border with: Blaine County, Cassia County, Jerome County, Lincoln County

Website: http://minidoka.id.us

GPS coordinates: 42.85000,-113.64000

Latest update: December 10, 2025 15:56