Vehicle Registration Plates of Idaho

County Coding

The following codes are found on standard-issue Idaho license plates. The naming convention is the order of the county in an alphabetical list followed by the first letter of the county name. For example, 2T indicates the second Idaho county beginning with T in an alphabetical list, or Twin Falls County. If only one Idaho county begins with a particular letter, the letter alone serves as the county code. Idaho specialty and vanity license plates do not use county codes; some non-passenger types are county-coded, while others are not.

County	Code
Ada	01A !1A
Adams	02A !2A
Bannock	01B !1B
Bear Lake	02B !2B
Benewah	03B !3B
Bingham	04B !4B
Blaine	05B !5B
Boise	06B !6B
Bonner	07B !7B
Bonneville	08B !8B
Boundary	09B !9B
Butte	10B !10B
Camas	01C !1C
Canyon	02C !2C
Caribou	03C !3C
Cassia	04C !4C
Clark	05C !5C
Clearwater	06C !6C
Custer	07C !7C
Elmore	00E !E
Franklin	01F !1F
Fremont	02F !2F
Gem	01G !1G
Gooding	02G !2G
Idaho	00I !I
Jefferson	01J !1J
Jerome	02J !2J
Kootenai	00K !K
Latah	01L !1L
Lemhi	02L !2L
Lewis	03L !3L
Lincoln	04L !4L
Madison	01M !1M
Minidoka	02M !2M
Nez Perce	00N !N
Oneida	01O !1O
Owyhee	02O !2O
Payette	01P !1P
Power	02P !2P
Shoshone	00S !S
Teton	01T !1T
Twin Falls	02T !2T
Valley	00V !V
Washington	00W !W