California

California has 58 Counties.

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  • California State Association of Counties
    1100 K Street, Suite 101
    Sacramento, CA 95814-3932
    Phone: (916)327-7500
    Fax: (916)441-5507
    http://www.csac.counties.org

    County NACo
    Member
    2010
    Population
    Square
    Miles
    County Seat Board
    Size
    Founded
    Alameda 1,510,271 739 Oakland   1853 
    Alpine 1,175 738 Markleeville   1864 
    Amador 38,091 595 Jackson   1854 
    Butte 220,000 1,636 Oroville   1850 
    Calaveras 45,578 1,020 San Andreas   1850 
    Colusa 21,419 1,151 Colusa   1850 
    Contra Costa 1,049,025 716 Martinez   1850 
    Del Norte 28,610 1,006 Crescent City   1857 
    El Dorado 181,058 1,708 Placerville   1850 
    Fresno   930,450 5,958 Fresno   1856 
    Glenn 28,122 1,314 Willows   1891 
    Humboldt 134,623 3,568 Eureka   1853 
    Imperial 174,528 4,177 El Centro   1907 
    Inyo 18,546 10,181 Independence   1866 
    Kern 839,631 8,132 Bakersfield   1866 
    Kings 152,982 1,389 Hanford   1893 
    Lake 64,665 1,256 Lakeport   1861 
    Lassen 34,895 4,541 Susanville   1864 
    Los Angeles 9,818,605 4,058 Los Angeles   1850 
    Madera 150,865 2,137 Madera   1893 
    Marin 252,409 520 San Rafael   1850 
    Mariposa 18,251 1,449 Mariposa   1850 
    Mendocino 87,841 3,506 Ukiah   1850 
    Merced 255,793 1,935 Merced   1855 
    Modoc   9,686 3,918 Alturas   1874 
    Mono 14,202 3,049 Bridgeport  1861 
    Monterey 415,057 3,281 Salinas   1850 
    Napa 136,484 748 Napa   1850 
    Nevada 98,764 958 Nevada City   1851 
    Orange 3,010,232 791 Santa Ana   1889 
    Placer 348,432 1,407 Auburn   1851 
    Plumas 20,007 2,553 Quincy   1854 
    Riverside 2,189,641 7,206 Riverside   1893 
    Sacramento 1,418,788 965 Sacramento  1850 
    San Benito   55,269 1,389 Hollister   1874 
    San Bernardino 2,035,210 20,057 San Bernardino   1853 
    San Diego 3,095,313 4,207 San Diego  1850 
    San Francisco* 805,235 47 San Francisco  11  1850 
    San Joaquin 685,306 1,391 Stockton   1850 
    San Luis Obispo 269,637 3,299 San Luis Obispo   1850 
    San Mateo 718,451 448 Redwood City   1856 
    Santa Barbara 423,895 2,735 Santa Barbara   1850 
    Santa Clara 1,781,642 1,290 San Jose  1850 
    Santa Cruz 262,382 445 Santa Cruz   1850 
    Shasta 177,223 3,775 Redding   1850 
    Sierra 3,240 953 Downieville   1852 
    Siskiyou 44,900 6,278 Yreka   1852 
    Solano 413,344 822 Fairfield   1850 
    Sonoma 483,878 1,576 Santa Rosa  1850 
    Stanislaus   514,453 1,495 Modesto   1854 
    Sutter 94,737 602 Yuba City  1850 
    Tehama 63,463 2,950 Red Bluff   1856 
    Trinity 13,786 3,179 Weaverville   1850 
    Tulare   442,179 4,824 Visalia   1852 
    Tuolumne 55,365 2,221 Sonora   1850 
    Ventura 823,318 1,843 Ventura  1872 
    Yolo 200,849 1,015 Woodland   1850 
    Yuba   72,155 632 Marysville   1850 

      * Consolidated City-County Government