Minidoka County is a county located in the U.S. state of Idaho. As of the 2020 census, the population was 21,613. The county seat and largest city is Rupert.

Rupert is the county seat and largest city of Minidoka County, Idaho. It is part of the Burley Micropolitan Statistical Area. The population was 6,082 at the 2020 census, up from 5,554 in 2010.