Idaho Code § 22-3304
(2) There shall be one (1) member from each of the five (5) districts described hereinafter:
District 1. The six (6) northern counties: Boundary, Bonner, Kootenai, Benewah, Latah and Shoshone.
District 2. Nez Perce, Lewis, Idaho, Adams, Washington, Payette, Gem, Boise, Valley and Clearwater Counties.
District 3. Canyon, Owyhee, Ada, Elmore, Camas, Gooding, Twin Falls, Blaine, Lincoln, Jerome, Minidoka and Cassia Counties.
District 4. Lemhi, Custer, Butte, Clark, Fremont, Jefferson, Madison, Teton, Bingham and Bonneville Counties.
District 5. Power, Bannock, Caribou, Oneida, Franklin and Bear Lake Counties.
[22-3304, added 1959, ch. 6, sec. 4, p. 13; am. 2012, ch. 77, sec. 3, p. 223.]