License plate county codes

Publisher

Organization

Idaho Transportation Department

Publisher’s dataset

Rules Governing License Plate Provisions, IDAPA 39.02.60, Section 100 (License Plate Provisions for Standard Plates), Subsection 01 (County Designations)

File or API used

https://adminrules.idaho.gov/rules/current/39/390260.pdf

Retrieval script

scripts/fetch-itd-plate-county-codes.py

Methodology

https://legislature.idaho.gov/statutesrules/idstat/Title49/T49CH4/SECT49-443/

Coverage

Geography

Counties

Time coverage

2026

Update frequency

Irregular. The rule is amended through IDAPA rulemaking as needed, not on a periodic release schedule; each subsection carries its own effective-date stamp rather than a publication date.

Published

July 1, 2026

Retrieved

September 9, 2026

License of the records

Idaho public record.

Rows

44 records

Measures

Records

One row per Idaho county's standard license plate designator code, as printed in IDAPA 39.02.60.100.01.

• code: The county designator as printed on the plate, e.g. "1A", "10B", "E".
• county: The county name as printed in the rule (without the word "County").
• geo: The county's FIPS code, matched by name in data/geographies.json.

Caveats

• The code applies only to standard plates issued under Idaho Code 49-402, not restricted, dealer, manufacturer, or legislative plate series.
• This is a lookup table, not a measurement: no observation, period, or unit is attached to a county's code.

How to cite

Understand Idaho, “Rules Governing License Plate Provisions, IDAPA 39.02.60, Section 100 (License Plate Provisions for Standard Plates), Subsection 01 (County Designations)”, compiled from Idaho Transportation Department, Rules Governing License Plate Provisions, IDAPA 39.02.60, Section 100 (License Plate Provisions for Standard Plates), Subsection 01 (County Designations). Retrieved September 9, 2026. https://understandidaho.com/data/itd-plate-county-codes/.

Cite Idaho Transportation Department directly for the figures themselves.