California Counties 

 

County
Date Formed
Parent County
County Seat
Coordinator
Alameda 1853 Contra Costa, Santa Clara Oakland  
Alpine 1864 El Dorado, Amador, Calaveras Markleeville  
Amador 1854 Calaveras Jackson  
Butte 1850 Original County Oroville  
Calaveras 1850 Original County San Andreas  
Colusa 1850 Original County Colusa  
Contra Costa 1850 Original County Martinez  
Del Norte 1857 Klamath Crescent City  
El Dorado 1850 Original County Placerville  
Fresno 1856 Merced, Mariposa Fresno  
Glenn 1891 Colusa Willows  
Humboldt 1853 Trinity Eureka  
Imperial 1907 San Diego El Centro  
Inyo 1866 Tulare Independence  
Kern 1866 Tulare, Los Angeles Bakersfield  
Kings 1893 Tulare, Fresno Hanford  
Lake 1861 Napa Lakeport  
Lassen 1864 Plumas, Shasta Susanville  
Los Angeles 1850 Original County Los Angeles  
Madera 1893 Mariposa, Fresno Madera  
Marin 1850 Original County San Rafael  
Mariposa 1850 Original County Mariposa  
Mendocino 1850 Original County Ukiah  
Merced 1855 Mariposa Merced  
Modoc 1874 Siskiyou Alturas  
Mono 1861 Calaveras, Fresno Bridgeport  
Monterey 1850 Original County Salinas  
Napa 1850 Original County Napa  
Nevada 1851 Yuba Nevada City  
Orange 1889 Orange Santa Ana  
Placer 1851 Placer Auburn  
Plumas 1854 Plumas Quincy  
Riverside 1893 San Diego, San Bernardino Riverside  
Sacramento 1850 Original County Sacramento  
San Benito 1874 Monterey Hollister  
San Bernardino 1853 Los Angeles San Bernardino  
San Diego 1850 Original County San Diego  
San Francisco 1850 Original County San Francisco  
San Joaquin 1850 Original County Stockton  
San Luis Obispo 1850 Original County San Luis Obispo  
San Mateo 1856 San Francisco Redwood City  
Santa Barbara 1850 Original County Santa Barbara  
Santa Clara 1850 Original County SSan Jose  
Santa Cruz 1850 Original County Santa Cruz  
Shasta 1850 Original County Redding  
Sierra 1852 Yuba Downieville  
Siskiyou 1852 Shasta, Klamath, Oregon Yreka  
Solano 1850 Original County Fairfield  
Sonoma 1850 Original County Santa Rosa  
Stanislaus 1854 Tuolumne Modesto  
Sutter 1850 Original County Yuba City  
Tehama 1856 Colusa, Butte, Shasta Red Bluff  
Trinity 1850 Original County Weaverville  
Tulare 1852 Mariposa Visalia  
Tuolumne 1850 Original County Sonora  
Ventura 1872 Santa Barbara Ventura  
Yolo 1850 Original County Woodland  
Yuba 1850 Original County Marysville

Linda Simpson

 

If there is a county you wish to adopt, e-mail
District Administrator
Gail Meyer-Kilgore



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