
I den amerikanska delstaten Kalifornien finns 58 countyn.
Kaliforniens delstatskonstitution föreskiver särskilda roller för ett county och det finns två varanter: general law county och charter county. Skillnaden är att ett charter county har antagit stadgar (engelska: charter), som godkänts av delstaten, och som ger en större grad av självstyre, men ingen utökad beskattningsrätt. Stadgarna kan dock återkallas av delstaten.
I samtliga kaliforniska countyn finns tre folkvalda befattningshavare: assessor, distriktsåklagare samt sheriff. För varje county i delstaten Kalifornien finns en Superior Court som första rättsinstans i brott- och civilmål.
| Namn | Centralort (County Seat) |
Grundat | Typ av county | Karta | Ref |
|---|---|---|---|---|---|
| Alameda County | Oakland | 1853 | charter county | ||
| Alpine County | Markleeville | 1864 | general law county | ||
| Amador County | Jackson | 1854 | general law county | ||
| Butte County | Oroville | 1850 | charter county | ||
| Calaveras County | San Andreas | 1850 | general law county | ||
| Colusa County | Colusa | 1850 | general law county | ||
| Contra Costa County | Martinez | 1850 | general law county | ||
| Del Norte County | Crescent City | 1857 | general law county | ||
| El Dorado County | Placerville | 1850 | charter county | ||
| Fresno County | Fresno | 1856 | charter county | ||
| Glenn County | Willows | 1891 | general law county | ||
| Humboldt County | Eureka | 1853 | general law county | ||
| Imperial County | El Centro | 1907 | general law county | ||
| Inyo County | Independence | 1866 | general law county | ||
| Kern County | Bakersfield | 1866 | general law county | ||
| Kings County | Hanford | 1893 | general law county | ||
| Lake County | Lakeport | 1861 | general law county | ||
| Lassen County | Susanville | 1864 | general law county | ||
| Los Angeles County | Los Angeles | 1850 | charter county | ||
| Madera County | Madera | 1893 | general law county | ||
| Marin County | San Rafael | 1850 | general law county | ||
| Mariposa County | Mariposa | 1850 | general law county | ||
| Mendocino County | Ukiah | general law county | 1850 | ||
| Merced County | Merced | general law county | 1855 | ||
| Modoc County | Alturas | 1874 | general law county | ||
| Mono County | Bridgeport | 1861 | general law county | ||
| Monterey County | Salinas | 1850 | general law county | ||
| Napa County | Napa | 1850 | general law county | ||
| Nevada County | Nevada City | 1851 | general law county | ||
| Orange County | Santa Ana | 1889 | charter county | ||
| Placer County | Auburn | 1851 | charter county | ||
| Plumas County | Quincy | 1854 | general law county | ||
| Riverside County | Riverside | 1893 | general law county | ||
| Sacramento County | Sacramento | 1850 | charter county | ||
| San Benito County | Hollister | 1874 | general law county | ||
| San Bernardino County | San Bernardino | 1853 | charter county | ||
| San Diego County | San Diego | 1850 | charter county | ||
| San Francisco | San Francisco | 1850 | charter county | ||
| San Joaquin County | Stockton | 1850 | general law county | ||
| San Luis Obispo County | San Luis Obispo | 1850 | general law county | ||
| San Mateo County | Redwood City | 1856 | charter county | ||
| Santa Barbara County | Santa Barbara | 1850 | general law county | ||
| Santa Clara County | San José | 1850 | charter county | ||
| Santa Cruz County | Santa Cruz | 1850 | general law county | ||
| Shasta County | Redding | 1850 | general law county | ||
| Sierra County | Downieville | 1852 | general law county | ||
| Siskiyou County | Yreka | 1852 | general law county | ||
| Solano County | Fairfield | 1850 | general law county | ||
| Sonoma County | Santa Rosa | 1850 | general law county | ||
| Stanislaus County | Modesto | 1854 | general law county | ||
| Sutter County | Yuba City | 1850 | general law county | ||
| Tehama County | Red Bluff | 1856 | charter county | ||
| Trinity County | Weaverville | 1850 | general law county | ||
| Tulare County | Visalia | 1852 | general law county | ||
| Tuolumne County | Sonora | 1850 | general law county | ||
| Ventura County | Ventura | 1872 | general law county | ||
| Yolo County | Woodland | 1850 | general law county | ||
| Yuba County | Marysville | 1850 | general law county | ||
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