IDAHO COUNTY CODES
1932 1933 1934-44 1945-on
A1 1A 1A 1A Ada
A2 2A 2A 2A Adams
A3 3A 3A 1B Bannock
A4 4A 4A 2B Bear Lake
A5 5A 5A 3B Benewah
A6 6A 6A 4B Bingham
A7 7A 7A 5B Blaine
A8 8A 8A 6B Boise
A9 9A 9A 7B Bonner
B1 1B 1P 8B Bonneville
B2 2B 2P 9B Boundary
B3 3B 3P 10B Butte
B4 4B 4P 1C Camas
B5 5B 5P 2C Canyon
B6 6B 6P 3C Caribou
B7 7B 7P 4C Cassia
B8 8B 8P 5C Clark
B9 9B 9P 6C Clearwater
H1 1H 1H 7C Custer
H2 2H 2H E Elmore
H3 3H 3H 1F Franklin
H4 4H 4H 2F Fremont
H5 5H 5H 1G Gem
H6 6H 6H 2G Gooding
H7 7H 7H I Idaho
H8 8H 8H 1J Jefferson
H9 9H 9H 2J Jerome
K1 1K 1K K Kootenai
K2 2K 2K 1L Latah
K3 3K 3K 2L Lemhi
K4 4K 4K 3L Lewis
K5 5K 5K 4L Lincoln
K6 6K 6K 1M Madison
K7 7K 7K 2M Minidoka
K8 8K 8K N Nez Perce
K9 9K 9K 1O Oneida
R1 1R 1R 2O Owyhee
R2 2R 2R 1P Payette
R3 3R 3R 2P Power
R4 4R 4R S Shoshone
R5 5R 5R 1T Teton
R6 6R 6R 2T Twin Falls
R7 7R 7R V Valley
R8 8R 8R W Washington
