California County Map & County List
Explore all 58 California counties on an interactive Census county map. Search counties by name or FIPS, compare population estimates and land area, and open detailed county profiles.
Popular California County Profiles
Explore more California counties: Riverside County · San Bernardino County · Santa Clara County · Alameda County · Sacramento County
Southern California: Los Angeles County · San Diego County · Orange County
San Francisco Bay Area: San Francisco County
Select a county on the map or in the table to highlight its boundary. Map boundaries and land area are from U.S. Census Bureau TIGERweb. Scroll-wheel map zoom is disabled to make page scrolling easier.
California County Directory
Population: ACS 2020–2024 5-year estimate. Land area: Census TIGERweb.
| County | FIPS | Population | Land area (sq mi) |
|---|---|---|---|
| Alameda County | 06001 | — | — |
| Alpine County | 06003 | — | — |
| Amador County | 06005 | — | — |
| Butte County | 06007 | — | — |
| Calaveras County | 06009 | — | — |
| Colusa County | 06011 | — | — |
| Contra Costa County | 06013 | — | — |
| Del Norte County | 06015 | — | — |
| El Dorado County | 06017 | — | — |
| Fresno County | 06019 | — | — |
| Glenn County | 06021 | — | — |
| Humboldt County | 06023 | — | — |
| Imperial County | 06025 | — | — |
| Inyo County | 06027 | — | — |
| Kern County | 06029 | — | — |
| Kings County | 06031 | — | — |
| Lake County | 06033 | — | — |
| Lassen County | 06035 | — | — |
| Los Angeles County | 06037 | — | — |
| Madera County | 06039 | — | — |
| Marin County | 06041 | — | — |
| Mariposa County | 06043 | — | — |
| Mendocino County | 06045 | — | — |
| Merced County | 06047 | — | — |
| Modoc County | 06049 | — | — |
| Mono County | 06051 | — | — |
| Monterey County | 06053 | — | — |
| Napa County | 06055 | — | — |
| Nevada County | 06057 | — | — |
| Orange County | 06059 | — | — |
| Placer County | 06061 | — | — |
| Plumas County | 06063 | — | — |
| Riverside County | 06065 | — | — |
| Sacramento County | 06067 | — | — |
| San Benito County | 06069 | — | — |
| San Bernardino County | 06071 | — | — |
| San Diego County | 06073 | — | — |
| San Francisco County | 06075 | — | — |
| San Joaquin County | 06077 | — | — |
| San Luis Obispo County | 06079 | — | — |
| San Mateo County | 06081 | — | — |
| Santa Barbara County | 06083 | — | — |
| Santa Clara County | 06085 | — | — |
| Santa Cruz County | 06087 | — | — |
| Shasta County | 06089 | — | — |
| Sierra County | 06091 | — | — |
| Siskiyou County | 06093 | — | — |
| Solano County | 06095 | — | — |
| Sonoma County | 06097 | — | — |
| Stanislaus County | 06099 | — | — |
| Sutter County | 06101 | — | — |
| Tehama County | 06103 | — | — |
| Trinity County | 06105 | — | — |
| Tulare County | 06107 | — | — |
| Tuolumne County | 06109 | — | — |
| Ventura County | 06111 | — | — |
| Yolo County | 06113 | — | — |
| Yuba County | 06115 | — | — |
County names and FIPS codes are available without JavaScript. Population and area values load from external services when available.
How many counties are in California?
California has 58 counties. They span the Pacific coastline, the Central Valley, the Sierra Nevada, the Bay Area, and inland desert areas. County boundaries can differ from city boundaries and ZIP code service areas.
California county FIPS codes
California uses state FIPS code 06. Each county has three additional digits, producing a five-digit geographic identifier. Los Angeles County is 06037. Search these codes in the table above or use the FIPS lookup tool.
About population and land area
California’s most populous county is Los Angeles County. San Bernardino County has the largest land area. Population shown in the table is based on the ACS 2020–2024 5-year estimates, rather than a real-time count.
ACS figures are sample-based statistical estimates, not a live population count. Land area excludes water and may differ from total area. Values can be unavailable when the underlying data service is unreachable.
Sources and methodology
County boundaries, land area, names and FIPS codes: U.S. Census Bureau TIGERweb. Population: 2020–2024 American Community Survey estimates supplied through Census Reporter. The map uses OpenStreetMap base tiles. These maps are not legal surveys. Read Data & Methodology or return to the state directory for more details.