California County Map
Labeled county boundary map and complete directory of all 58 counties in California (CA, State FIPS 06). View 5-digit FIPS codes, county seats, land area in square miles, and official county government websites below.
Showing all 58 counties in California. Use the search box below to filter by county name, 5-digit FIPS code, or county seat.
California County Statistics & Summary
Total Counties
58
Largest by Land Area
San Bernardino County
Smallest by Land Area
San Francisco County
All 58 Counties in California (FIPS, County Seat & Official Website)
| County Name | 5-Digit FIPS | Seat / Administrative Center | Land Area (sq mi) | Coordinates | Official Website |
|---|---|---|---|---|---|
| Alameda County | 06001 | Oakland | 737.5 | 37.640°, -121.907° | Official Site |
| Alpine County | 06003 | Markleeville | 738.3 | 38.602°, -119.845° | Official Site |
| Amador County | 06005 | Jackson | 594.6 | 38.443°, -120.652° | Official Site |
| Butte County | 06007 | Oroville | 1,636.5 | 39.665°, -121.603° | Official Site |
| Calaveras County | 06009 | San Andreas | 1,020 | 38.191°, -120.554° | Official Site |
| Colusa County | 06011 | Colusa | 1,150.6 | 39.178°, -122.238° | Official Site |
| Contra Costa County | 06013 | Martinez | 716.9 | 37.908°, -121.959° | Official Site |
| Del Norte County | 06015 | Crescent City | 1,006.2 | 41.747°, -123.953° | Official Site |
| El Dorado County | 06017 | Placerville | 1,707.8 | 38.786°, -120.534° | Official Site |
| Fresno County | 06019 | Fresno | 5,958.6 | 36.761°, -119.655° | Official Site |
| Glenn County | 06021 | Willows | 1,313.9 | 39.602°, -122.402° | Official Site |
| Humboldt County | 06023 | Eureka | 3,568 | 40.707°, -123.926° | Official Site |
| Imperial County | 06025 | El Centro | 4,175.5 | 33.041°, -115.355° | Official Site |
| Inyo County | 06027 | Independence | 10,197.3 | 36.611°, -117.307° | Official Site |
| Kern County | 06029 | Bakersfield | 8,134.7 | 35.356°, -118.719° | Official Site |
| Kings County | 06031 | Hanford | 1,391 | 36.072°, -119.816° | Official Site |
| Lake County | 06033 | Lakeport | 1,255.1 | 39.108°, -122.746° | Official Site |
| Lassen County | 06035 | Susanville | 4,541.4 | 40.708°, -120.609° | Official Site |
| Los Angeles County | 06037 | Los Angeles | 4,060.3 | 34.196°, -118.262° | Official Site |
| Madera County | 06039 | Madera | 2,136.7 | 37.206°, -119.749° | Official Site |
| Marin County | 06041 | San Rafael | 520.1 | 38.051°, -122.746° | Official Site |
| Mariposa County | 06043 | Mariposa | 1,448.8 | 37.574°, -119.912° | Official Site |
| Mendocino County | 06045 | Ukiah | 3,506.8 | 39.433°, -123.427° | Official Site |
| Merced County | 06047 | Merced | 1,938 | 37.194°, -120.722° | Official Site |
| Modoc County | 06049 | Alturas | 3,948.2 | 41.593°, -120.718° | Official Site |
| Mono County | 06051 | Bridgeport | 3,048.9 | 37.910°, -118.879° | Official Site |
| Monterey County | 06053 | Salinas | 3,281.7 | 36.240°, -121.316° | Official Site |
| Napa County | 06055 | Napa | 752 | 38.507°, -122.326° | Official Site |
| Nevada County | 06057 | Nevada City | 957.8 | 39.308°, -120.743° | Official Site |
| Orange County | 06059 | Santa Ana | 793.2 | 33.676°, -117.777° | Official Site |
| Placer County | 06061 | Auburn | 1,407.4 | 39.067°, -120.716° | Official Site |
| Plumas County | 06063 | Quincy | 2,553.1 | 39.992°, -120.824° | Official Site |
| Riverside County | 06065 | Riverside | 7,209 | 33.801°, -115.948° | Official Site |
| Sacramento County | 06067 | Sacramento | 965.4 | 38.449°, -121.343° | Official Site |
| San Benito County | 06069 | Hollister | 1,388.7 | 36.612°, -121.086° | Official Site |
| San Bernardino County | 06071 | San Bernardino | 20,068.4 | 34.857°, -116.182° | Official Site |
| San Diego County | 06073 | San Diego | 4,210.9 | 33.019°, -116.770° | Official Site |
| San Francisco County | 06075 | San Francisco | 46.7 | 37.727°, -123.032° | — |
| San Joaquin County | 06077 | Stockton | 1,392.3 | 37.935°, -121.272° | Official Site |
| San Luis Obispo County | 06079 | San Luis Obispo | 3,300.8 | 35.388°, -120.449° | Official Site |
| San Mateo County | 06081 | Redwood City | 448.6 | 37.415°, -122.371° | Official Site |
| Santa Barbara County | 06083 | Santa Barbara | 2,733.9 | 34.537°, -120.038° | Official Site |
| Santa Clara County | 06085 | San Jose | 1,291.1 | 37.222°, -121.689° | Official Site |
| Santa Cruz County | 06087 | Santa Cruz | 445.1 | 37.012°, -122.008° | Official Site |
| Shasta County | 06089 | Redding | 3,775.6 | 40.760°, -122.044° | Official Site |
| Sierra County | 06091 | Downieville | 953.2 | 39.577°, -120.522° | Official Site |
| Siskiyou County | 06093 | Yreka | 6,278.8 | 41.586°, -122.534° | Official Site |
| Solano County | 06095 | Fairfield | 821.7 | 38.267°, -121.940° | Official Site |
| Sonoma County | 06097 | Santa Rosa | 1,575.3 | 38.522°, -122.916° | Official Site |
| Stanislaus County | 06099 | Modesto | 1,496.2 | 37.562°, -121.003° | Official Site |
| Sutter County | 06101 | Yuba City | 602.7 | 39.036°, -121.704° | Official Site |
| Tehama County | 06103 | Red Bluff | 2,949.1 | 40.126°, -122.232° | Official Site |
| Trinity County | 06105 | Weaverville | 3,179.3 | 40.648°, -123.115° | Official Site |
| Tulare County | 06107 | Visalia | 4,823.9 | 36.229°, -118.781° | Official Site |
| Tuolumne County | 06109 | Sonora | 2,220.9 | 38.021°, -119.965° | Official Site |
| Ventura County | 06111 | Ventura | 1,840.8 | 34.359°, -119.133° | Official Site |
| Yolo County | 06113 | Woodland | 1,013 | 38.679°, -121.901° | Official Site |
| Yuba County | 06115 | Marysville | 632 | 39.270°, -121.344° | Official Site |
How California Counties and 5-Digit FIPS Codes Work
In U.S. Census Bureau TIGER/Line geography, California (CA) is assigned the 2-digit state Federal Information Processing Series (FIPS) code 06 and covers 155,860 square miles of land area across 58 counties in the Pacific Time (PT) zone (with Sacramento as the state capital). Every county in the directory above carries a unique 5-digit GEOID formed by combining state prefix 06 with a 3-digit county code (ranging alphabetically from Alameda County at 06001 to Yuba County at 06115).
Because U.S. Postal Service 5-digit ZIP Codes follow mail carrier delivery routes rather than local government borders, many postal addresses in California carry a neighboring city’s mailing name or sit inside a multi-county ZIP Code Tabulation Area (ZCTA). Property tax assessments, deed recording, circuit and county court venue, voter registration precincts, sheriff jurisdiction, and county sales tax rates in California are determined by the legal county boundary shown on the map above rather than the postal city name on an envelope.
Land area figures in square miles and internal centroid coordinates (INTPTLAT, INTPTLON) come directly from the U.S. Census Bureau’s current TIGERweb State_County benchmark, while 58 administrative seats and 57 verified official government websites are cross-referenced from Wikidata (CC0). Need a clean outline worksheet without county labels, or want to verify which California county a specific home or business address sits in? Open the Blank Map of California, run a street-segment check on Address to County Lookup, check multi-county postal overlap on ZIP Code to County Lookup, or browse all 50 states on the National U.S. County Map.
Adjacent State County Maps
Explore county maps and FIPS directories for states bordering California: