Counties of California

Counties of California
Name	Counties
Category	County
Territory	California
Current number	58
Population range	1,223 (Alpine) – 9,721,138 (Los Angeles) (2023)
Area range	47 square miles (San Francisco) – 20,057 square miles (San Bernardino)
Government	County government
Subdivision	City, Town, Census-designated place

Counties of California. The 58 counties of the U.S. state of California are the primary legal and administrative subdivisions of the state. They provide a wide range of services, including law enforcement through sheriff's departments, public health programs, and the maintenance of local roads. The most populous county is Los Angeles County, while the smallest by area is the consolidated city-county of San Francisco.

History

The first California county was created in 1850, coinciding with California's admission to the Union following the Mexican–American War and the California Gold Rush. These original 27 counties were carved from the former Mexican Alta California territories. Notable early creations include Los Angeles County, San Diego County, and Santa Clara County. The last county to be formed was Imperial County, established in 1907 from land in San Diego County to support agricultural development in the Imperial Valley. Historical boundary changes were frequent, with counties like Kern County and San Bernardino County gaining vast territories.

List of counties

California's counties are listed alphabetically by official name, from Alameda County to Yolo County. The most populous counties are Los Angeles County, San Diego County, Orange County, Riverside County, and San Bernardino County. By contrast, the least populous are Alpine County, Sierra County, and Modoc County. Each county has a designated county seat, such as Sacramento in Sacramento County and San Jose in Santa Clara County.

Government

Each county is governed by an elected Board of Supervisors, with executive functions often carried out by an appointed County executive officer. Key elected officials include the Sheriff, District attorney, and County assessor. The California Constitution and the California Government Code grant counties specific powers. The City and county of San Francisco is California's only consolidated city-county. Counties also administer state-mandated programs for social services, public health, and superior courts.

Geography

County geography is immensely diverse, spanning the Pacific Ocean coastline, the Central Valley, the Sierra Nevada, and the Mojave Desert. The largest county by area is San Bernardino County, which is larger than several U.S. states including Connecticut and New Hampshire. Counties encompass major geographic features like Lake Tahoe (shared by El Dorado County and Placer County), Death Valley (mostly within Inyo County), and Yosemite National Park (primarily in Mariposa County).

Demographics

Demographics vary dramatically between counties, as reflected in data from the United States Census Bureau. Los Angeles County is the most populous county in the United States. Diversity is high in counties like Alameda County and Santa Clara County, home to significant Asian American populations. In contrast, counties in the northern interior like Tehama County are less densely populated and have different ethnic compositions.

Economy

County economies are often specialized. Los Angeles County is a global hub for entertainment and international trade. Santa Clara County is the center of Silicon Valley and technology. Kern County and Fresno County are leaders in agricultural production. San Francisco is a major center for finance and tourism. San Diego County has a strong biotechnology and military presence due to institutions like UC San Diego and Navy bases.

Category:Counties of California California Category:Administrative divisions of California