List of counties in California

List of counties in California

The U.S. state of California is divided into 58 counties. Counties are responsible for all elections, property-tax collection, maintenance of public records such as deeds, and local-level courts within their borders, as well as providing law enforcement (through the county sheriff and sheriff's deputies) to areas that do not lie within incorporated cities.

  • The county is the default unit of local government (all parts of the state's land are allocated to one of the state's 58 counties). Each county has a Board of Supervisors and is subject to mandatory duties under state law to provide its residents with services like law enforcement, healthcare, road maintenance, and so on. Balancing a county's mandatory and discretionary duties is a very difficult task; any sufficiently injured county taxpayer has standing to sue the county to enforce certain duties where financial distress is no excuse, such as healthcare.
  • Residents of a sufficiently large piece of unincorporated county land can incorporate a city. The city government then takes some of the tax revenue that would have gone to the county, and can impose additional taxes on its residents. It can then choose to provide almost all the services usually provided by the county (and more), or provide only a few and pay the county to do the rest. A city in this last arrangement is called a contract city; this type of contract is generally known among lawyers as the "Lakewood Plan", because it was pioneered by the city of Lakewood in 1954.[1]
  • The idea of "opting out" of county control in California has been taken to its logical extremes. Almost all of the city of Vernon is one large industrial zone, while almost all of the town of Los Altos Hills is zoned as residential.
  • Due to geographical variations in property tax and sales tax revenue (the primary revenue source for cities and counties) and differing attitudes towards priorities, there are variations in the levels of various services from one city to the next. For example, the city of Santa Monica is far more generous when it comes to helping the homeless than other cities in Los Angeles County or the county government.
  • Also, county ordinances do not apply to cities unless they are ratified by each individual city. Thus, for instance, in Los Angeles County, a few cities have not ratified the ordinance requiring the posting of restaurant inspection ratings—even though it was passed many years ago—and in those cities, ratings need not be posted.
  • One consolidated city–county is located in the state, San Francisco. The city's board of supervisors govern both aspects, and there is both a city police department and a county sheriff, the latter mostly responsible for operating the county jail.


First establishment of California counties

County FIPS code of California

On January 4, 1850, the California constitutional committee recommended the formation of 18 counties. They were Benicia, Butte, Fremont, Los Angeles, Mariposa, Monterey, Mount Diablo, Oro, Redding, Sacramento, San Diego, San Francisco, San Joaquin, San Jose, San Luis Obispo, Santa Barbara, Sonoma, and Sutter. On April 22, the counties of Branciforte, Calaveras, Coloma, Colusi, Marin, Mendocino, Napa, Trinity, and Yuba were added. Benicia was renamed Solano, Coloma to El Dorado, Fremont to Yolo, Mt. Diablo to Contra Costa, San Jose to Santa Clara, Oro to Tuolumne, and Redding to Shasta. One of the first state legislative acts regarding counties was to rename Branciforte County to Santa Cruz, Colusi to Colusa, and Yola to Yolo.

The last county in California to be established is Imperial County on August 7, 1907.

California's postal abbreviation is CA and its FIPS state code is 06.


FIPS code
County seat
Formed from
Alameda County 001 Oakland 1853 Contra Costa and Santa Clara Spanish for "avenue shaded by trees" or "cottonwood grove." &100000000015102710000001,510,271 &10000000000000738000000738 sq mi
(&100000000000019110000001,911 km2)
State map highlighting Alameda County

Alpine County 003 Markleeville 1864 Amador, El Dorado, Calaveras, Mono and Tuolumne Location high in the Sierra Nevada. &100000000000011750000001,175 &10000000000000739000000739 sq mi
(&100000000000019140000001,914 km2)
State map highlighting Alpine County

Amador County 005 Jackson 1854 Calaveras Jose Maria Amador (1794-1883), a soldier, rancher, and miner who, along with several Native Americans, established a successful gold mining camp near present-day Amador City in 1848. &1000000000003809100000038,091 &10000000000000593000000593 sq mi
(&100000000000015360000001,536 km2)
State map highlighting Amador County

Butte County 007 Oroville 1850 Original Sutter Buttes, mistakenly thought to be in the county during the county's establishment. &10000000000220000000000220,000 &100000000000016400000001,640 sq mi
(&100000000000042480000004,248 km2)
State map highlighting Butte County

Calaveras County 009 San Andreas 1850 Original Calaveras River; calaveras is Spanish for "skulls." &1000000000004557800000045,578 &100000000000010200000001,020 sq mi
(&100000000000026420000002,642 km2)
State map highlighting Calaveras County

Colusa County 011 Colusa 1850 Original Rancho Colus land grant from Mexico. &1000000000002141900000021,419 &100000000000011510000001,151 sq mi
(&100000000000029810000002,981 km2)
State map highlighting Colusa County

Contra Costa County 013 Martinez 1850 Original Spanish for "opposite coast," from its location across San Francisco Bay from San Francisco. &100000000010490250000001,049,025 &10000000000000720000000720 sq mi
(&100000000000018650000001,865 km2)
State map highlighting Contra Costa County

Del Norte County 015 Crescent City 1857 Klamath Spanish for "northern," from its far northern location. &1000000000002861000000028,610 &100000000000010080000001,008 sq mi
(&100000000000026110000002,611 km2)
State map highlighting Del Norte County

El Dorado County 017 Placerville 1850 Original El Dorado, a mythical city of gold, owing to the area's importance in the California Gold Rush. &10000000000181058000000181,058 &100000000000017120000001,712 sq mi
(&100000000000044340000004,434 km2)
State map highlighting El Dorado County

Fresno County 019 Fresno 1856 Mariposa, Merced and Tulare Fresno Creek; fresno is Spanish for "ash tree." &10000000000930450000000930,450 &100000000000059630000005,963 sq mi
(&1000000000001544400000015,444 km2)
State map highlighting Fresno County

Glenn County 021 Willows 1891 Colusa Dr. Hugh J. Glenn, a California businessman and politician. &1000000000002812200000028,122 &100000000000013150000001,315 sq mi
(&100000000000034060000003,406 km2)
State map highlighting Glenn County

Humboldt County 023 Eureka 1853 Trinity Humboldt Bay, named after Alexander von Humboldt, a German naturalist and explorer. &10000000000134623000000134,623 &100000000000035730000003,573 sq mi
(&100000000000092540000009,254 km2)
State map highlighting Humboldt County

Imperial County 025 El Centro 1907 San Diego Imperial Valley, named for the Imperial Land Company. &10000000000174528000000174,528 &100000000000041750000004,175 sq mi
(&1000000000001081300000010,813 km2)
State map highlighting Imperial County

Inyo County 027 Independence 1866 Mono and Tulare Disputed original; early settlers believed Inyo to be the native name for area mountains, but this term may be the name of a Mono Indian leader &1000000000001854600000018,546 &1000000000001019200000010,192 sq mi
(&1000000000002639700000026,397 km2)
State map highlighting Inyo County

Kern County 029 Bakersfield 1866 Los Angeles and Tulare Kern River, named for Edward Kern, cartographer for John C. Fremont's 1845 expedition. &10000000000839631000000839,631 &100000000000081420000008,142 sq mi
(&1000000000002108800000021,088 km2)
State map highlighting Kern County

Kings County 031 Hanford 1893 Tulare Kings River, original Spanish name Rio de los Santos Reyes ("River of the Holy Kings"). &10000000000152982000000152,982 &100000000000013900000001,390 sq mi
(&100000000000036000000003,600 km2)
State map highlighting Kings County

Lake County 033 Lakeport 1861 Napa Clear Lake &1000000000006466500000064,665 &100000000000012580000001,258 sq mi
(&100000000000032580000003,258 km2)
State map highlighting Lake County

Lassen County 035 Susanville 1864 Plumas and Shasta, and now defunct Lake County, Nevada Peter Lassen, a Danish naturalist and explorer. &1000000000003489500000034,895 &100000000000045580000004,558 sq mi
(&1000000000001180500000011,805 km2)
State map highlighting Lassen County

Los Angeles County 037 Los Angeles 1850 Original Spanish for "The Angels," abbreviated from El Pueblo de Nuestra Señora la Reina de los Angeles del Río de Porciúncula (The Village of Our Lady, the Queen of the Angels of the river of Porziuncola). &100000000098186050000009,818,605 &100000000000040600000004,060 sq mi
(&1000000000001051500000010,515 km2)
State map highlighting Los Angeles County

Madera County 039 Madera 1893 Mariposa Spanish for "wood", in reference to the forested area of the landscape &10000000000150865000000150,865 &100000000000021380000002,138 sq mi
(&100000000000055370000005,537 km2)
State map highlighting Madera County

Marin County 041 San Rafael 1850 Original Disputed, but could be a corrupted abbreviation of Bahía de Nuestra Señora del Rosario la Marina, the Spanish name for area headlands along San Francisco Bay. &10000000000252409000000252,409 &10000000000000520000000520 sq mi
(&100000000000013470000001,347 km2)
State map highlighting Marin County

Mariposa County 043 Mariposa 1850 Original Spanish for "butterfly." &1000000000001825100000018,251 &100000000000014510000001,451 sq mi
(&100000000000037580000003,758 km2)
State map highlighting Mariposa County

Mendocino County 045 Ukiah 1850 Original Antonio de Mendoza, first viceroy of New Spain. &1000000000008784100000087,841 &100000000000035090000003,509 sq mi
(&100000000000090880000009,088 km2)
State map highlighting Mendocino County

Merced County 047 Merced 1855 Mariposa Merced River; original Spanish name El Río de Nuestra Señora de la Merced ("River of Our Lady of Mercy"). &10000000000255793000000255,793 &100000000000019290000001,929 sq mi
(&100000000000049960000004,996 km2)
State map highlighting Merced County

Modoc County 049 Alturas 1874 Siskiyou The Modoc people &100000000000096860000009,686 &100000000000039440000003,944 sq mi
(&1000000000001021500000010,215 km2)
State map highlighting Modoc County

Mono County 051 Bridgeport 1861 Calaveras, Fresno and Mariposa Mono Lake; name derived from Monachi, a Yokut name for native peoples of the Sierra Nevada. &1000000000001420200000014,202 &100000000000030440000003,044 sq mi
(&100000000000078840000007,884 km2)
State map highlighting Mono County

Monterey County 053 Salinas 1850 Original Monterey Bay, Spanish portmanteau of monte ("hill") and rey ("king"). &10000000000415057000000415,057 &100000000000033220000003,322 sq mi
(&100000000000086040000008,604 km2)
State map highlighting Monterey County

Napa County 055 Napa 1850 Original Disputed origin; possibly derived from the Patwin word napo, meaning home. &10000000000136484000000136,484 &10000000000000754000000754 sq mi
(&100000000000019530000001,953 km2)
State map highlighting Napa County

Nevada County 057 Nevada City 1851 Yuba Spanish for "snow-covered," referrencing the area's high elevation &1000000000009876400000098,764 &10000000000000958000000958 sq mi
(&100000000000024810000002,481 km2)
State map highlighting Nevada County

Orange County 059 Santa Ana 1889 Los Angeles The orange, which was widely grown in the area at the time the county was established. &100000000030102320000003,010,232 &10000000000000790000000790 sq mi
(&100000000000020460000002,046 km2)
State map highlighting Orange County

Placer County 061 Auburn 1851 Sutter and Yuba Spanish term for gravel deposits that contain gold; references the California Gold Rush, which was centered in the area. &10000000000348432000000348,432 &100000000000015030000001,503 sq mi
(&100000000000038930000003,893 km2)
State map highlighting Placer County

Plumas County 063 Quincy 1854 Butte Feather River; Spanish name El Rio de las Plumas. &1000000000002000700000020,007 &100000000000025540000002,554 sq mi
(&100000000000066150000006,615 km2)
State map highlighting Plumas County

Riverside County 065 Riverside 1893 San Bernardino and San Diego The city of Riverside, named for its location on the Santa Ana River. &100000000021896410000002,189,641 &100000000000072080000007,208 sq mi
(&1000000000001866900000018,669 km2)
State map highlighting Riverside County

Sacramento County 067 Sacramento 1850 Original Sacramento River, named for the Santisimo Sacramento (Spanish for "Most Holy Sacrament"). &100000000014187880000001,418,788 &10000000000000966000000966 sq mi
(&100000000000025020000002,502 km2)
State map highlighting Sacramento County

San Benito County 069 Hollister 1874 Monterey Saint Benedict (San Benedicto in Spanish; Benito is the diminutive of Benedicto). &1000000000005526900000055,269 &100000000000013890000001,389 sq mi
(&100000000000035970000003,597 km2)
State map highlighting San Benito County

San Bernardino County 071 San Bernardino 1853 Los Angeles City of San Bernardino, named for Saint Bernardino of Siena (San Bernardino de Siena in Spanish) &100000000020352100000002,035,210 &1000000000002006200000020,062 sq mi
(&1000000000005196000000051,960 km2)
State map highlighting San Bernardino County

San Diego County 073 San Diego 1850 Original Spanish for Saint Didacus &100000000030953130000003,095,313 &100000000000042040000004,204 sq mi
(&1000000000001088800000010,888 km2)
State map highlighting San Diego County

San Francisco County 075 San Francisco 1850 Original Spanish for Saint Francis. &10000000000805235000000805,235 &1000000000000004700000047 sq mi
(&10000000000000122000000122 km2)
State map highlighting San Francisco County

San Joaquin County 077 Stockton 1850 Original Spanish for Saint Joachim. &10000000000685306000000685,306 &100000000000013990000001,399 sq mi
(&100000000000036230000003,623 km2)
State map highlighting San Joaquin County

San Luis Obispo County 079 San Luis Obispo 1850 Original Spanish for Saint Louis, the Bishop. &10000000000269637000000269,637 &100000000000033040000003,304 sq mi
(&100000000000085570000008,557 km2)
State map highlighting San Luis Obispo County

San Mateo County 081 Redwood City 1856 San Francisco Spanish for Saint Matthew. &10000000000718451000000718,451 &10000000000000449000000449 sq mi
(&100000000000011630000001,163 km2)
State map highlighting San Mateo County

Santa Barbara County 083 Santa Barbara 1850 Original Spanish for Saint Barbara. &10000000000423895000000423,895 &100000000000027380000002,738 sq mi
(&100000000000070910000007,091 km2)
State map highlighting Santa Barbara County

Santa Clara County 085 San Jose 1850 Original Spanish for Saint Clare. &100000000017816420000001,781,642 &100000000000012910000001,291 sq mi
(&100000000000033440000003,344 km2)
State map highlighting Santa Clara County

Santa Cruz County 087 Santa Cruz 1850 Original Mission Santa Cruz &10000000000262382000000262,382 &10000000000000446000000446 sq mi
(&100000000000011550000001,155 km2)
State map highlighting Santa Cruz County

Shasta County 089 Redding 1850 Original Mount Shasta &10000000000177223000000177,223 &100000000000037860000003,786 sq mi
(&100000000000098060000009,806 km2)
State map highlighting Shasta County

Sierra County 091 Downieville 1852 Yuba Spanish for "mountain range," referencing the area's topography &100000000000032400000003,240 &10000000000000953000000953 sq mi
(&100000000000024680000002,468 km2)
State map highlighting Sierra County

Siskiyou County 093 Yreka 1852 Shasta and Klamath Siskiyou Mountains; etymology of Siskiyou is disputed. &1000000000004490000000044,900 &100000000000062870000006,287 sq mi
(&1000000000001628300000016,283 km2)
State map highlighting Siskiyou County

Solano County 095 Fairfield 1850 Original Chief Solano of the Suisunes &10000000000413344000000413,344 &10000000000000828000000828 sq mi
(&100000000000021450000002,145 km2)
State map highlighting Solano County

Sonoma County 097 Santa Rosa 1850 Original Disputed origin; possibly a Pomo term meaning "valley of the moon," which references a native legend about spiritual activity in the area. &10000000000483878000000483,878 &100000000000015760000001,576 sq mi
(&100000000000040820000004,082 km2)
State map highlighting Sonoma County

Stanislaus County 099 Modesto 1854 Tuolumne Stanislaus River, named for Estanislao. &10000000000514453000000514,453 &100000000000014950000001,495 sq mi
(&100000000000038720000003,872 km2)
State map highlighting Stanislaus County

Sutter County 101 Yuba City 1850 Original John Sutter, a Swiss pioneer of California associated with the California Gold Rush. &1000000000009473700000094,737 &10000000000000603000000603 sq mi
(&100000000000015620000001,562 km2)
State map highlighting Sutter County

Tehama County 103 Red Bluff 1856 Butte, Colusa and Shasta The Tehama people, a local Native American tribe. &1000000000006346300000063,463 &100000000000029510000002,951 sq mi
(&100000000000076430000007,643 km2)
State map highlighting Tehama County

Trinity County 105 Weaverville 1850 Original The Trinity River, named for the town of Trinidad (Spanish for "Trinity"). &1000000000001378600000013,786 &100000000000031790000003,179 sq mi
(&100000000000082340000008,234 km2)
State map highlighting Trinity County

Tulare County 107 Visalia 1852 Mariposa Tulare Lake &10000000000442179000000442,179 &100000000000048240000004,824 sq mi
(&1000000000001249400000012,494 km2)
State map highlighting Tulare County

Tuolumne County 109 Sonora 1850 Original Disputed origin; possibly a corruption of the native term talmalamne, which means cluster of stone wigwams and references local cave dwelling tribes &1000000000005536500000055,365 &100000000000022360000002,236 sq mi
(&100000000000057910000005,791 km2)
State map highlighting Tuolumne County

Ventura County 111 Ventura 1872 Santa Barbara Abbreviation of San Buenaventura, Spanish for St. Bonaventure. &10000000000823318000000823,318 &100000000000018460000001,846 sq mi
(&100000000000047810000004,781 km2)
State map highlighting Ventura County

Yolo County 113 Woodland 1850 Original The Yolan people, a local Native American tribe. &10000000000200849000000200,849 &100000000000010120000001,012 sq mi
(&100000000000026210000002,621 km2)
State map highlighting Yolo County

Yuba County 115 Marysville 1850 Original The Yuba family, who owned ranches in the Sacramento River Valley. &1000000000007215500000072,155 &10000000000000630000000630 sq mi
(&100000000000016320000001,632 km2)
State map highlighting Yuba County

Defunct counties

  • Klamath County was created in 1851 from the northern half of Trinity County. Part of the county's territory went to Del Norte County in 1857, and in 1874 the remainder was divided between Humboldt and Siskiyou counties.
  • Pautah County was created in 1852 out of territory which, the state of California assumed, was to be ceded to it by the United States Congress from territory in what is now the state of Nevada. When the cession never occurred, the California State Legislature officially abolished the never-created county in 1859.

Failed attempts to organize Counties

  • Buena Visa County 1855-1859 (later Kern County).
  • Coso County 1864 (later Inyo County).
  • San Antonio County in the late 1870s/early 1880s of eastern Los Angeles and southwest San Bernardino counties.
  • Desert County in 1943-1946 of eastern Riverside county. See also Cahuilla County, California attempt in the late 1980s.
  • High Desert County in 2003-2006 period to encompass northern Los Angeles, western San Bernardino and eastern Kern counties.

County Secession proposals

City-County-Borough proposals

See also


External links

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