Benewah County is a county located in the northwest part of the U.S. state of Idaho. As of the 2020 United States Census the county had a population of 9,530. The county seat and largest city is St. Maries, which has some area inside the Coeur d'Alene Reservation.

Kootenai County is located in the U.S. state of Idaho. As of the 2020 census, its population was 171,362, making it the third-most populous county in Idaho and by far the largest in North Idaho, the county accounting for 45.4% of the region's total population. The county seat and largest city is Coeur d'Alene. The county was established in 1864 and named after the Kootenai tribe.