California counties and county equivalents
These are current canonical geography records. Historical boundaries and election reporting units can differ; consult each area's caveats.
- Alameda County
FIPS 06001
- Alpine County
FIPS 06003
- Amador County
FIPS 06005
- Butte County
FIPS 06007
- Calaveras County
FIPS 06009
- Colusa County
FIPS 06011
- Contra Costa County
FIPS 06013
- Del Norte County
FIPS 06015
- El Dorado County
FIPS 06017
- Fresno County
FIPS 06019
- Glenn County
FIPS 06021
- Humboldt County
FIPS 06023
- Imperial County
FIPS 06025
- Inyo County
FIPS 06027
- Kern County
FIPS 06029
- Kings County
FIPS 06031
- Lake County
FIPS 06033
- Lassen County
FIPS 06035
- Los Angeles County
FIPS 06037
- Madera County
FIPS 06039
- Marin County
FIPS 06041
- Mariposa County
FIPS 06043
- Mendocino County
FIPS 06045
- Merced County
FIPS 06047
- Modoc County
FIPS 06049
- Mono County
FIPS 06051
- Monterey County
FIPS 06053
- Napa County
FIPS 06055
- Nevada County
FIPS 06057
- Orange County
FIPS 06059
- Placer County
FIPS 06061
- Plumas County
FIPS 06063
- Riverside County
FIPS 06065
- Sacramento County
FIPS 06067
- San Benito County
FIPS 06069
- San Bernardino County
FIPS 06071
- San Diego County
FIPS 06073
- San Francisco County
FIPS 06075
- San Joaquin County
FIPS 06077
- San Luis Obispo County
FIPS 06079
- San Mateo County
FIPS 06081
- Santa Barbara County
FIPS 06083
- Santa Clara County
FIPS 06085
- Santa Cruz County
FIPS 06087
- Shasta County
FIPS 06089
- Sierra County
FIPS 06091
- Siskiyou County
FIPS 06093
- Solano County
FIPS 06095
- Sonoma County
FIPS 06097
- Stanislaus County
FIPS 06099
- Sutter County
FIPS 06101
- Tehama County
FIPS 06103
- Trinity County
FIPS 06105
- Tulare County
FIPS 06107
- Tuolumne County
FIPS 06109
- Ventura County
FIPS 06111
- Yolo County
FIPS 06113
- Yuba County
FIPS 06115