Alameda Formed:1853    Parent: Contra Costa	Alpine Formed:1864    Parent: Eldorado, Amador, Calaveras	Amador Formed:1854    Parent: Calaveras	Butte Formed:1850   Parent: Original County
Calaveras Formed:1850   Parent: Original County	Colusa Formed:1850   Parent: Original County	Contra Costa Formed:1850    Parent: Original County	Del Norte Formed:1857   Parent: Klamath
El Dorado Formed:1850   Parent: Original County	Fresno Formed:1856    Parent: Merced, Mariposa	Glenn Formed:1891    Parent: Colusa	Humboldt Formed:1853    Parent: Trinity
Imperial Formed:1907   Parent: San Diego	Inyo Formed:1866    Parent: Tulare	Kern Formed:1866   Parent: Tulare, Los Angeles	Kings Formed:1893    Parent: Tulare, Fresno
Klamath Formed:1851   Parent: Trinity	Lake Formed:1861   Parent: Napa	Lassen Formed:1864   Parent: Plumas, Shasta	Los Angeles Formed:1850   Parent: Original County
Madera Formed:1893    Parent:Mariposa, Fresno	Marin Formed:1850   Parent: Original County	Mariposa Formed:1850   Parent: Original County	Mendocino Formed:1850   Parent: Original County
Merced Formed:1855    Parent:Mariposa	Modoc Formed:1874   Parent: Siskiyou	Mono Formed:1861   Parent: Calaveras, Fresno	Monterey Formed:1850   Parent: Original County
Napa Formed:1850    Parent:Original County	Nevada Formed:1851    Parent:Yuba	Orange Formed:1889    Parent:Los Angeles	Placer Formed:1851   Parent: Yuba, Sutter
Plumas Formed:1854    Parent:Butte	Riverside Formed:1893   Parent: San Diego, San Bernardino	Sacramento Formed:1850   Parent: Original County	San Benito Formed:1874   Parent: Monterey
San Bernardino Formed:1853    Parent:Los Angeles	San Diego Formed:1850   Parent: Original County	San Francisco Formed:1850   Parent: Original County	San Joaquin Formed:1850   Parent: Original County
San Luis Obispo Formed:1850   Parent: Original County	San Mateo Formed:1856    Parent:San Francisco	Santa Barbara Formed:1850   Parent: Original County	Santa Clara Formed:1850   Parent: Original County
Santa Cruz Formed:1850   Parent: Original County	Shasta Formed:1850    Parent:Original County	Sierra Formed:1852   Parent: Yuba	Siskiyou Formed:1852   Parent: Shasta, Klamath, Oregon
Solano Formed:1850   Parent: Original County	Sonoma Formed:1850   Parent: Original County	Stanislaus Formed:1854   Parent: Tuolumne	Sutter Formed:1850   Parent: Original County
Tehama Formed:1856   Parent: Colusa, Butte, Shasta	Trinity Formed:1850    Parent:Original County	Tulare Formed:1852   Parent: Mariposa	Tuolumne Formed:1850   Parent: Original County
Ventura Formed:1872   Parent: Santa Barbara	Yolo Formed:1850    Parent:Original County	Yuba Formed:1850    Parent:Original County