Today’s article is on California Counties. There are 58 counties in California. First, there were 27 in numbers, then 16 was added. Later on, another 14 was added making it a total of 58.
We will list out all of them together with their county seats, year formed, population and area. They will be properly arranged in alphabetical order.
Table of Contents
A list of California Counties, Year formed, Population, County Seats, and Area
Alameda County
Formed: 1853
Population: 1,682
County Seat: Oakland
Area: 353 738 sq mi
Alpine County
Formed:1864
Population:40,474
County Seat: Markleeville
Area: 606 sq mi
Amador County
Formed: 1854
Population:40,474
County Seat: Jackson
Area: 606 sq mi
Butte County
Formed: 1850
Population: 211,632
County Seat: Jackson
Area:1 640 sq mi
Calaveras County
Formed: 1850
Population: 45,292
County Seat: San Andreas
Area: 1,020 sq mi
Colusa County
Formed: 1850
Population: 21,839
County Seat: Colusa
Area: 1,151 sq mi
Contra Costa County
Formed: 1850
Population: 1,165,927
County Seat:Martinez
Area: 720 sq mi
Del Norte County
Formed: 1857
Population: 27,743
County Seat: Crescent City
Area: 1,008 sq mi
El Dorado County
Formed: 1850
Population: 191,185
County Seat: Placerville
Area: 1,712 sq mi
Fresno County
Formed: 1856
Population: 1,008,654
County Seat: Fresno
Area: 5,963 sq mi
Glenn County
Formed: 1891
Population: 28,917 1
County Seat: Willows
Area: 315 sq mi
Humboldt County
Formed: 1853
Population: 136,463
County Seat:Eureka
Area: 3,573 sq mi
Imperial County
Formed: 1907
Population: 179,702
County Seat:El Centro
Area: 4,175 sq mi
Inyo County
Formed: 1866
Population: 19,016
County Seat: Independence
Area: 10,192 sq mi
Kern County
Formed: 1866
Population: 909,235
County Seat: Bakersfield
Area: 8,142 sq mi
Kings County
Formed: 1893
Population: 152,486
County Seat: Hanford
Area:1, 390 sq mi
Lake County
Formed: 1861
Population: 68,163
County Seat: Lakeport
Area: 1,258 sq mi
Lassen County
Formed: 1864
Population: 32,730
County Seat: Susanville
Area: 4,558 sq mi
Los Angeles County
Formed: 1850
Population: 10,014,009
County Seat: Los Angeles
Area: 4,060 sq mi
Madera County
Formed:1893
Population: 156,255
County Seat:Madera
Area: 2,138 sq mi
Marin County
Formed: 1850
Population: 156,255
County Seat: San Rafael
Area: 2,138 sq mi
Mariposa County
Formed: 1850
Population: 91,601
County Seat: Ukiah
Area: 3,509 sq mi
Merced County
Formed: 1855
Population: 281,202
County Seat: Merced
Area: 1,929 sq mi
Modoc County
formed:1874
Population: 8,700
County Seat: Alturas
Area: 3,944 sq mi
Mono County
formed: 1861
Population: 13,195
County Seat: Bridgeport
Area: 3,044 sq mi
Monterey County
formed: 1850
Population: 439,035
County Seat: Salinas
Area: 3,322 sq mi
Napa County
formed: 1850
Population: 138,019
County Seat: Napa
Area: 754 sq mi
Nevada County
formed: 1851
Population: 102,241
County Seat: Nevada City
Area: 958 sq mi
Orange County
Formed: 1889
Population: 3,186,989
County Seat: Santa Ana
Area: 948 sq mi
Placer County
Formed: 1851
Population: 404,739
County Seat: Auburn
Area: 1,407 sq mi
Plumas County
Formed: 1854
Population: 19,790
County Seat: Quincy
Area: 2,554 sq mi
Riverside County
Formed: 1893
Population: 2,418,185
County Seat: Riverside
Area: 7,208 sq mi
Sacramento County
Formed: 1850
Population: 1,585,055
County Seat: Sacramento
Area: 966 sq mi
San Benito County
Formed: 1874
Population: 64,209
County Seat: Hollister
Area: 1,389 sq mi
San Bernardino County
Formed: 1853
Population: 2,181,654
County Seat: San Bernardino
Area: 20,062 sq mi
San Francisco
Formed: 1850
Population: 873,965
County Seat: San Francisco
Area: 47 sq mi
San Joaquin County
Formed: 1850
Population: 779,233
County Seat: Stockton
Area: 1,399 sq mi
San Luis Obispo County
Formed: 1850
Population: 282,424
County Seat: San Luis Obispo
Area: 3,304 sq mi
San Mateo County
Formed: 1856
Population: 764,442
County Seat:Redwood City
Area: 449 sq mi
Santa Barbara County
Formed: 1850
Population: 448,229
County Seat:Santa Barbara
Area:2,738 sq mi
Santa Clara County
Formed: 1850
Population: 1,936,259
County Seat: San Jose
Area: 1,291 sq mi
Santa Cruz County
Formed: 1850
Population: 270,861
County Seat: Santa Cruz
Area: 446 sq mi
Shasta County
Formed: 1850
Population: 182,155
County Seat: Redding
Area: 3,786 sq mi
Sierra County
Formed: 1852
Population: 3,236
County Seat: Downieville
Area: 953 sq mi
Siskiyou County
Formed: 1852
Population: 44,076
County Seat: Yreka
Area: 6,287 sq mi
Solano County
Formed: 1850
Population: 453,491
County Seat: Fairfield
Area: 828 sq mi
Sonoma County
Formed: 1850
Population: 488,863
County Seat: Santa Rosa
Area: 1,576 sq mi
Stanislaus County
Formed: 1854
Population: 552,878
County Seat: Modesto
Area: 1,495 sq mi
Sutter County
Formed: 1850
Population: 99,633
County Seat: Yuba City
Area: 603 sq mi
Tehama County
Formed: 1856
Population: 65,829
County Seat: Red Bluff
Area: 2,951 sq mi
Trinity County
Formed: 1850
Population: 16,112
County Seat: Weaverville
Area: 3,179 sq mi
Tulare County
Formed: 1852
Population: 473,117
County Seat: Visalia
Area: 4,824 sq mi
Tuolumne County
Formed: 1850
Population: 55,620
County Seat: Sonora
Area: 2,236 sq mi
Ventura County
Formed: 1872
Population: 843,843
County Seat: Ventura
Area: 1,846 sq mi
Yolo County
Formed: 1850
Population: 216,403
County Seat: Woodland
Area: 1,012 sq mi
Yuba County
Formed: 1850
Population: 81,575
County Seat: Marysville
Area: 630 sq mi
Summary
We’ve come to the end of this article on California Counties. They are 58 of them listed in an alphabetical order.
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