Idaho County Codes

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These codes were established in 1932 and remain in use today.

County Code #: County (County Seat)

1A: Ada (Boise)
2A: Adams (Council)
1B: Bannock (Pocatello)
2B: Bear Lake (Paris)
3B: Benewah (St. Maries)
4B: Bingham (Blackfoot)
5B: Blaine (Hailey)
6B: Boise (Idaho City)
7B: Bonner (Sandpoint)
8B: Bonneville (Idaho Falls)
9B: Boundary (Bonner's Ferry)
10B: Butte (Arco)
1C: Camas (Fairfield)
2C: Canyon (Caldwell)
3C: Caribou (Soda Springs)
4C: Cassia (Burley)
5C: Clark (Dubois)
6C: Clearwater (Orofino)
7C: Custer (Challis)
E: Elmore (Mountain Home)
1F: Franklin (Preston)
2F: Fremont (St. Anthony)
1G: Gem (Emmett)
2G: Gooding (Gooding)
I: Idaho (Grangeville)
1J: Jefferson (Rigby)
2J: Jerome (Jerome)
K: Kootenai (Coeur d'Alene)
1L: Latah (Moscow)
2L: Lemhi (Salmon)
3L: Lewis (Nez Perce)
4L: Lincoln (Shoshone)
1M: Madison (Rexburg)
2M: Minidoka (Rupert)
N: Nez Perce (Lewiston)
1O: Oneida (Malad City)
2O: Owyhee (Murphy)
1P: Payette (Payette)
2P: Power (American Falls)
S: Shoshone (Wallace)
1T: Teton (Driggs)
2T: Twin Falls (Twin Falls)
V: Valley (Cascade)
W: Washington (Weiser)

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© Copyright 1998-2017 David Nicholson. All Rights Reserved.

Last Modified 2/8/1999.