Download Excel File List of Counties in California

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S.No.,County,FIPS code,Population(2021),Area,County seat,Est.,General Law or Charter ,Formed from1,Alameda County,001,"1,648,556","738sqmi(1,911km)",Oakland,1853,Charter,Contra Costa and Santa Clara2,Alpine County,003,"1,235","739sqmi(1,914km)",Markleeville,1864,General Law,"Amador, El Dorado, Calaveras, Mono and Tuolumne"3,Amador County,005,"41,259","606sqmi(1,570km)",Jackson,1854,General Law,Calaveras4,Butte County,007,"208,309","1,640sqmi(4,248km)",Oroville,1850,Charter,original5,Calaveras County,009,"46,221","1,020sqmi(2,642km)",San Andreas,1850,General Law,original6,Colusa County,011,"21,917","1,151sqmi(2,981km)",Colusa,1850,General Law,original7,Contra Costa County,013,"1,161,413","720sqmi(1,865km)",Martinez,1850,General Law,original8,Del Norte County,015,"28,100","1,008sqmi(2,611km)",Crescent City,1857,General Law,Klamath9,El Dorado County,017,"193,221","1,712sqmi(4,434km)",Placerville,1850,Charter,original10,Fresno County,019,"1,013,581","5,963sqmi(15,444km)",Fresno,1856,Charter,"Mariposa, Merced and Tulare"11,Glenn County,021,"28,805","1,315sqmi(3,406km)",Willows,1891,General Law,Colusa12,Humboldt County,023,"136,310","3,573sqmi(9,254km)",Eureka,1853,General Law,Trinity13,Imperial County,025,"179,851","4,175sqmi(10,813km)",El Centro,1907,General Law,San Diego14,Inyo County,027,"18,970","10,192sqmi(26,397km)",Independence,1866,General Law,Mono and Tulare15,Kern County,029,"917,673","8,142sqmi(21,088km)",Bakersfield,1866,General Law,Los Angeles and Tulare16,Kings County,031,"153,443","1,390sqmi(3,600km)",Hanford,1893,General Law,Tulare17,Lake County,033,"68,766","1,258sqmi(3,258km)",Lakeport,1861,General Law,Napa18,Lassen County,035,"33,159","4,558sqmi(11,805km)",Susanville,1864,General Law,"Plumas and Shasta, and now defunct Lake County, Nevada"19,Los Angeles County,037,"9,829,544","4,060sqmi(10,515km)",Los Angeles,1850,Charter,original20,Madera County,039,"159,410","2,138sqmi(5,537km)",Madera,1893,General Law,Fresno21,Marin County,041,"260,206","520sqmi(1,347km)",San Rafael,1850,General Law,original22,Mariposa County,043,"17,147","1,451sqmi(3,758km)",Mariposa,1850,General Law,original23,Mendocino County,045,"91,305","3,509sqmi(9,088km)",Ukiah,1850,General Law,original24,Merced County,047,"286,461","1,929sqmi(4,996km)",Merced,1855,General Law,Mariposa25,Modoc County,049,"8,661","3,944sqmi(10,215km)",Alturas,1874,General Law,Siskiyou26,Mono County,051,"13,247","3,044sqmi(7,884km)",Bridgeport,1861,General Law,"Calaveras, Fresno and Mariposa"27,Monterey County,053,"437,325","3,322sqmi(8,604km)",Salinas,1850,General Law,original28,Napa County,055,"136,207","754sqmi(1,953km)",Napa,1850,General Law,original29,Nevada County,057,"103,487","958sqmi(2,481km)",Nevada City,1851,General Law,Yuba30,Orange County,059,"3,167,809","948sqmi(2,455km)",Santa Ana,1889,Charter,Los Angeles31,Placer County,061,"412,300","1,407sqmi(3,644km)",Auburn,1851,Charter,Sacramento32,Plumas County,063,"19,915","2,554sqmi(6,615km)",Quincy,1854,General Law,Butte33,Riverside County,065,"2,458,395","7,208sqmi(18,669km)",Riverside,1893,General Law,San Bernardino and San Diego34,Sacramento County,067,"1,588,921","966sqmi(2,502km)",Sacramento,1850,Charter,original35,San Benito County,069,"66,677","1,389sqmi(3,597km)",Hollister,1874,General Law,Monterey36,San Bernardino County,071,"2,194,710","20,062sqmi(51,960km)",San Bernardino,1853,Charter,Los Angeles37,San Diego County,073,"3,286,069","4,204sqmi(10,888km)",San Diego,1850,Charter,original38,San Francisco,075,"815,201","47sqmi(122km)",San Francisco,1850,Charter,original39,San Joaquin County,077,"789,410","1,399sqmi(3,623km)",Stockton,1850,General Law,original40,San Luis Obispo County,079,"283,159","3,304sqmi(8,557km)",San Luis Obispo,1850,General Law,original41,San Mateo County,081,"737,888","449sqmi(1,163km)",Redwood City,1856,Charter,San Francisco and Santa Cruz42,Santa Barbara County,083,"446,475","2,738sqmi(7,091km)",Santa Barbara,1850,General Law,original43,Santa Clara County,085,"1,885,508","1,291sqmi(3,344km)",San Jose,1850,Charter,original44,Santa Cruz County,087,"267,792","446sqmi(1,155km)",Santa Cruz,1850,General Law,original45,Shasta County,089,"182,139","3,786sqmi(9,806km)",Redding,1850,General Law,original46,Sierra County,091,"3,283","953sqmi(2,468km)",Downieville,1852,General Law,Yuba47,Siskiyou County,093,"44,118","6,287sqmi(16,283km)",Yreka,1852,General Law,Shasta and Klamath48,Solano County,095,"451,716","828sqmi(2,145km)",Fairfield,1850,General Law,original49,Sonoma County,097,"485,887","1,576sqmi(4,082km)",Santa Rosa,1850,General Law,original50,Stanislaus County,099,"552,999","1,495sqmi(3,872km)",Modesto,1854,General Law,Tuolumne51,Sutter County,101,"99,063","603sqmi(1,562km)",Yuba City,1850,General Law,original52,Tehama County,103,"65,498","2,951sqmi(7,643km)",Red Bluff,1856,Charter,"Butte, Colusa and Shasta"53,Trinity County,105,"16,060","3,179sqmi(8,234km)",Weaverville,1850,General Law,original54,Tulare County,107,"477,054","4,824sqmi(12,494km)",Visalia,1852,General Law,Mariposa55,Tuolumne County,109,"55,810","2,236sqmi(5,791km)",Sonora,1850,General Law,original56,Ventura County,111,"839,784","1,846sqmi(4,781km)",Ventura,1872,General Law,Santa Barbara57,Yolo County,113,"216,986","1,012sqmi(2,621km)",Woodland,1850,General Law,original58,Yuba County,115,"83,421","630sqmi(1,632km)",Marysville,1850,General Law,original,,,,,,,,https://www.downloadexcelfiles.com/,,,,,,,,