California County Map

Counties of California

S.N.CountyFIPS CodeCounty SeatEst.Formed fromGeneral Law or CharterPopulation (July 2019)Area (sq mi)Area (km2)
1Alameda County1Oakland1853Contra Costa and Santa ClaraCharter1,671,3297381,911
2Alpine County3Markleeville1864Amador, El Dorado, Calaveras, Mono and TuolumneGeneral Law1,1297391,914
3Amador County5Jackson1854CalaverasGeneral Law39,7526061,570
4Butte County7Oroville1850originalCharter219,1861,6404,248
5Calaveras County9San Andreas1850originalGeneral Law45,9051,0202,642
6Colusa County11Colusa1850originalGeneral Law21,5471,1512,981
7Contra Costa County13Martinez1850originalGeneral Law1,153,5267201,865
8Del Norte County15Crescent City1857KlamathGeneral Law27,8121,0082,611
9El Dorado County17Placerville1850originalCharter192,8431,7124,434
10Fresno County19Fresno1856Mariposa, Merced and TulareCharter999,1015,96315,444
11Glenn County21Willows1891ColusaGeneral Law28,3931,3153,406
12Humboldt County23Eureka1853TrinityGeneral Law135,5583,5739,254
13Imperial County25El Centro1907San DiegoGeneral Law181,2154,17510,813
14Inyo County27Independence1866Mono and TulareGeneral Law18,03910,19226,397
15Kern County29Bakersfield1866Los Angeles and TulareGeneral Law900,2028,14221,088
16Kings County31Hanford1893TulareGeneral Law152,9401,3903,600
17Lake County33Lakeport1861NapaGeneral Law64,3861,2583,258
18Lassen County35Susanville1864Plumas and Shasta, and now defunct Lake County, NevadaGeneral Law30,5734,55811,805
19Los Angeles County37Los Angeles1850originalCharter10,039,1074,06010,515
20Madera County39Madera1893FresnoGeneral Law157,3272,1385,537
21Marin County41San Rafael1850originalGeneral Law258,8265201,347
22Mariposa County43Mariposa1850originalGeneral Law17,2031,4513,758
23Mendocino County45Ukiah1850originalGeneral Law86,7493,5099,088
24Merced County47Merced1855MariposaGeneral Law277,6801,9294,996
25Modoc County49Alturas1874SiskiyouGeneral Law8,8413,94410,215
26Mono County51Bridgeport1861Calaveras, Fresno and MariposaGeneral Law14,4443,0447,884
27Monterey County53Salinas1850originalGeneral Law434,0613,3228,604
28Napa County55Napa1850originalGeneral Law137,7447541,953
29Nevada County57Nevada City1851YubaGeneral Law99,7559582,481
30Orange County59Santa Ana1889Los AngelesCharter3,175,6929482,455
31Placer County61Auburn1851SacramentoCharter398,3291,4073,644
32Plumas County63Quincy1854ButteGeneral Law18,8072,5546,615
33Riverside County65Riverside1893San Bernardino and San DiegoGeneral Law2,470,5467,20818,669
34Sacramento County67Sacramento1850originalCharter1,552,0589662,502
35San Benito County69Hollister1874MontereyGeneral Law62,8081,3893,597
36San Bernardino County71San Bernardino1853Los AngelesCharter2,180,08520,06251,960
37San Diego County73San Diego1850originalCharter3,338,3304,20410,888
38San Francisco75San Francisco1850originalCharter881,54947122
39San Joaquin County77Stockton1850originalGeneral Law762,1481,3993,623
40San Luis Obispo County79San Luis Obispo1850originalGeneral Law283,1113,3048,557
41San Mateo County81Redwood City1856San Francisco and Santa CruzCharter766,5734491,163
42Santa Barbara County83Santa Barbara1850originalGeneral Law446,4992,7387,091
43Santa Clara County85San Jose1850originalCharter1,927,8521,2913,344
44Santa Cruz County87Santa Cruz1850originalGeneral Law273,2134461,155
45Shasta County89Redding1850originalGeneral Law180,0803,7869,806
46Sierra County91Downieville1852YubaGeneral Law3,0059532,468
47Siskiyou County93Yreka1852Shasta and KlamathGeneral Law43,5396,28716,283
48Solano County95Fairfield1850originalGeneral Law447,6438282,145
49Sonoma County97Santa Rosa1850originalGeneral Law494,3361,5764,082
50Stanislaus County99Modesto1854TuolumneGeneral Law550,6601,4953,872
51Sutter County101Yuba City1850originalGeneral Law96,9716031,562
52Tehama County103Red Bluff1856Butte, Colusa and ShastaCharter65,0842,9517,643
53Trinity County105Weaverville1850originalGeneral Law12,2853,1798,234
54Tulare County107Visalia1852MariposaGeneral Law466,1954,82412,494
55Tuolumne County109Sonora1850originalGeneral Law54,4782,2365,791
56Ventura County111Ventura1872Santa BarbaraGeneral Law846,0061,8464,781
57Yolo County113Woodland1850originalGeneral Law220,5001,0122,621
58Yuba County115Marysville1850originalGeneral Law78,6686301,632