Many of you have asked me for a reference on Idaho License Plates and what those pre-fix designation mean. Well...here it is! You can now view the number and letter reference to know which Idaho county certain vehicles are from.
Keep in mind, those who have personalized plates do not have the county designations, so there's no telling from where they came!
CountyDesignations 1932-Present
County
1932-1933
1934-1944
1945-ON
Ada
A1
1A
1A
Adams
A2
2A
2A
Bannock
A3
3A
1B
BearLake
A4
4A
2B
Benewah
A5
5A
3B
Bingham
A6
6A
4B
Blaine
A7
7A
5B
Boise
A8
8A
6B
Bonner
A9
9A
7B
Bonneville
B1
1P
8B
Boundary
B2
2P
9B
Butte
B3
3P
10B
Camas
B4
4P
1C
Canyon
B5
5P
2C
Caribou
B6
6P
3C
Cassia
B7
7P
4C
Clark
B8
8P
5C
Clearwater
B9
9P
6C
Custer
H1
1H
7C
Elmore
H2
2H
E
Franklin
H3
3H
1F
Fremont
H4
4H
2F
Gem
H5
5H
1G
Gooding
H6
6H
2G
Idaho
H7
7H
I
Jefferson
H8
8H
1J
Jerome
H9
9H
2J
Kootenai
K1
1K
K
Latah
K2
2K
1L
Lemhi
K3
3K
2L
Lewis
K4
4K
3L
Lincoln
K5
5K
4L
Madison
K6
6K
1M
Minidoka
K7
7K
2M
Nez Perce
K8
8K
N
Oneida
K9
9K
1O
Owyhee
R1
1R
2O
Payette
R2
2R
1P
Power
R3
3R
2P
Shoshone
R4
4R
S
Teton
R5
5R
1T
Twin Falls
R6
6R
2T
Valley
R7
7R
V
Washington
R8
8R
W
CountyLicense plate prefixes: before 1932, a straight numerical system was used with no county prefix. In 1932 and 1933, the letters A, B, H, K, and R were used with the numerals 1 through-9 as county prefixes. From 1934 through 1942, the same prefixes were used except that the B was changed to a P. In 1945 the county prefix designation was started.
When you're ready to move to Idaho and take on one of these beautiful plates, contact Idaho Realtor, Don Wixom to look out for your next move!
Don Wixom RE/MAX Advantage 5680 E Franklin Rd Ste 100 Nampa, ID 83687 Direct: (208) 880-5039 Office: (208) 466-0002 Fax: (208) 466-2227 Email:
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