Lincoln County is a county located in the U.S. state of Idaho. As of the 2020 census, the population was 5,127. The county seat and largest city is Shoshone. The county is named after President Abraham Lincoln. The Idaho Territory was created in 1863, during the Lincoln Administration of 1861–65.

Blaine County is a county in the U.S. state of Idaho. As of the 2020 United States Census, the population was 24,272. The county seat and largest city is Hailey. It is also home to the Sun Valley ski resort, adjacent to Ketchum.