California Counties
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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.

A list of California Counties, Year formed, Population, County Seats, and Area

Alameda County

Amusement, Carousel, Amusement Park

Formed: 1853

Population: 1,682

County Seat: Oakland

Area: 353 738 sq mi

Alpine County

Potato Field, Aroostook County

Formed:1864 

Population:40,474

County Seat: Markleeville

Area: 606 sq mi

Amador County  

House, Roof, Blue, Country, County, Home

Formed: 1854

Population:40,474

County Seat: Jackson

Area: 606 sq mi

Butte County

Mount St Helens, Volcanic Eruption

Formed: 1850

Population: 211,632

County Seat: Jackson

Area:1 640 sq mi

Calaveras County

Agriculture, Green, Rice, Asia, Bali

Formed: 1850

Population: 45,292

County Seat: San Andreas

Area: 1,020 sq mi

Colusa County

Village, Agriculture, Valley, Vietnam

Formed: 1850

Population: 21,839

County Seat: Colusa

Area: 1,151 sq mi

Contra Costa County

Sunset, Dawn, Nature, Dusk, Sun, Sky

Formed: 1850

Population: 1,165,927

County Seat:Martinez

Area:  720 sq mi

Del Norte County

Mansion, England, Estate, Country House

Formed: 1857

Population: 27,743

County Seat: Crescent City

Area: 1,008 sq mi

El Dorado County

Carnival Rides, Night, Ferris Wheel

Formed:  1850

Population: 191,185

County Seat: Placerville

Area: 1,712 sq mi

Fresno County

Farm Yard, Farm, Nature, Farmhouse, Fall

Formed: 1856

Population: 1,008,654

County Seat: Fresno 

Area: 5,963 sq mi

Glenn County

Agriculture, Asia, Go Back, Black

Formed: 1891

Population: 28,917 1 

County Seat: Willows 

Area: 315 sq mi

Humboldt County

Agriculture, Asia, Go Back, Black

Formed: 1853

Population: 136,463 

County Seat:Eureka

Area: 3,573 sq mi

Imperial County

Carnival, Summer, Ferris Wheel, Holiday

Formed: 1907

Population: 179,702 

County Seat:El Centro

Area: 4,175 sq mi

Inyo County

Agriculture, Asia, Bali, Cambodia, China

Formed: 1866

Population: 19,016

County Seat: Independence

Area: 10,192 sq mi

Kern County

Barn, Rustic, Barns, Ohio, Digital Art

Formed: 1866

Population: 909,235

County Seat: Bakersfield

Area: 8,142 sq mi

Kings County

Ireland, Forest, Nature, Green, Irish

Formed: 1893

Population: 152,486 

County Seat: Hanford 

Area:1, 390 sq mi

Lake County

Sunset, Dawn, Nature, Dusk, Sun, Heaven

Formed: 1861

Population: 68,163 

County Seat: Lakeport 

Area: 1,258 sq mi

Lassen County

Landscape, Ireland, Killarney

Formed: 1864

Population: 32,730 

County Seat: Susanville 

Area: 4,558 sq mi

Los Angeles County

Landscape, Ireland, Killarney

Formed: 1850

Population: 10,014,009

County Seat: Los Angeles 

Area: 4,060 sq mi

Madera County

Barn, Rustic, Barns, Ohio, Digital Art

Formed:1893

Population: 156,255 

County Seat:Madera 

Area: 2,138 sq mi

Marin County

Path, Wooden Track, Wooden Plank Path

Formed: 1850

Population: 156,255

County Seat: San Rafael 

Area: 2,138 sq mi

Mariposa County

Usa, America, North America, Moose

Formed: 1850

Population: 91,601 

County Seat: Ukiah

Area: 3,509 sq mi

 

Merced County

Gas Station, Workshop, Garage, Old

Formed: 1855

Population: 281,202 

County Seat: Merced 

Area: 1,929 sq mi

Modoc County

Yorkshire Rose, County, England

formed:1874

Population: 8,700

County Seat: Alturas 

Area: 3,944 sq mi

Mono County

Mount St Helens, Volcanic Eruption

formed: 1861

Population: 13,195

County Seat: Bridgeport 

Area: 3,044 sq mi

Monterey County

Montana, Barn, Landscape, Scenic, Hdr

formed: 1850 

Population: 439,035

County Seat: Salinas 

Area: 3,322 sq mi

Napa County

Park, Parklandschaft, English Garden

formed: 1850 

Population: 138,019 

County Seat: Napa 

Area: 754 sq mi

Nevada County

Texas, Usa, United States, America

formed: 1851

Population: 102,241 

County Seat: Nevada City 

Area: 958 sq mi

Orange County

Donut, Doughnut, Randy'S Donuts, Shop

Formed: 1889

Population: 3,186,989

County Seat: Santa Ana 

Area: 948 sq mi

Placer County

Tomb, Portal, Dolmen, Stone, Burial

Formed: 1851

Population: 404,739

County Seat: Auburn 

Area: 1,407 sq mi

Plumas County

Religion, Grave Facility, Brown Hill

Formed: 1854

Population: 19,790

County Seat: Quincy 

Area: 2,554 sq mi

Riverside County

Grand Tetons, Wyoming, Blue, Bear, Trees

Formed: 1893

Population: 2,418,185

County Seat: Riverside 

Area: 7,208 sq mi

Sacramento County

Quilt, Storm, Storm Clouds, Sun

Formed: 1850

Population: 1,585,055

County Seat: Sacramento 

Area: 966 sq mi

San Benito County

Mount Edgcumbe House, Mansion

Formed: 1874

Population: 64,209

County Seat: Hollister

Area: 1,389 sq mi

San Bernardino County

Mount Edgcumbe House, Mansion

Formed: 1853

Population: 2,181,654

County Seat: San Bernardino 

Area: 20,062 sq mi

San Francisco

Mansion, Villa, House, Architecture

Formed: 1850

Population: 873,965

County Seat: San Francisco 

Area: 47 sq mi

San Joaquin County

Scrabo Tower, Tower, Newtownards, Scrabo

Formed: 1850

Population: 779,233

County Seat: Stockton 

Area: 1,399 sq mi

San Luis Obispo County

Barn, Rustic, Barns, Ohio, Digital Art

Formed: 1850

Population: 282,424

County Seat: San Luis Obispo 

Area: 3,304 sq mi

San Mateo County

Giants Causeway, Northern Ireland

Formed: 1856

Population: 764,442

County Seat:Redwood City 

Area: 449 sq mi

Santa Barbara County

Landscape, Hill, Nature, Agriculture

Formed: 1850

Population: 448,229 

County Seat:Santa Barbara 

Area:2,738 sq mi

Santa Clara County

Night, Moon, Birds, Scenery, Trees

Formed: 1850

Population: 1,936,259 

County Seat: San Jose 

Area: 1,291 sq mi

Santa Cruz County

Barn, Rustic, Barns, Ohio, Digital Art

Formed: 1850

Population: 270,861 

County Seat: Santa Cruz 

Area: 446 sq mi

Shasta County

Outdoor, Forest, Foliage, Park, Green

Formed: 1850

Population: 182,155

County Seat: Redding 

Area: 3,786 sq mi

Sierra County

Lancashire Rose, County, England

Formed: 1852 

Population: 3,236

County Seat: Downieville 

Area: 953 sq mi

Siskiyou County

Mount St Helens, Volcano, Mountain

Formed: 1852 

Population: 44,076

County Seat: Yreka 

Area: 6,287 sq mi

Solano County

Quilt, Quilt Barn, Windmill, Barn

Formed: 1850

Population: 453,491

County Seat: Fairfield

Area: 828 sq mi

Sonoma County

Winter, City, Snow, Hungary, Building

Formed: 1850

Population: 488,863

County Seat: Santa Rosa 

Area: 1,576 sq mi

Stanislaus County

Away, Ireland, Abandoned

Formed: 1854

Population: 552,878 

County Seat: Modesto 

Area: 1,495 sq mi

Sutter County

Barn, Rustic, Barns, Swing, Broken Swing

Formed: 1850

Population: 99,633 

County Seat: Yuba City 

Area: 603 sq mi

Tehama County

Doc Ryburns House, Bannack, State, Park

Formed: 1856

Population: 65,829 

County Seat: Red Bluff 

Area: 2,951 sq mi

Trinity County

Rock, Insight, Canyon, Outlook

Formed: 1850

Population: 16,112 

County Seat: Weaverville 

Area: 3,179 sq mi

Tulare County

Scenery, Sunrise, Trees, Autumn, Bird

Formed: 1852

Population: 473,117 

County Seat: Visalia

Area: 4,824 sq mi

Tuolumne County
Barn, Rustic, Barns, Ohio, Digital Art

Formed: 1850

Population: 55,620 

County Seat: Sonora 

Area: 2,236 sq mi

Ventura County

Farmers Market Mixed Flowers, Sunflowers

Formed: 1872

Population: 843,843

County Seat: Ventura

Area: 1,846 sq mi

Yolo County

River, Rapids, Canyon, Water, Nature

Formed: 1850

Population: 216,403 

County Seat: Woodland

Area: 1,012 sq mi

Yuba County

Camping Tipi, Campground, Tent, Tipi

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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