Skip to content

California Genealogy Library and Resources

🏠 » Genealogy » Library

County research:

California

Statehood: 9 Sept 1850
31st state of the United States

Bordering states:
North: Oregon
East: Nevada, Arizona

Capital: Sacramento

Largest city: Los Angeles

Map: California, 1893
(click map to enlarge)
Library of Congress, Geography and Map Division

Counties: Original 1850 California counties at the time of statehood: Butte, Calaveras, Colusa, Contra Costa, El Dorado, Los Angeles, Marin, Mariposa, Mendocino, Monterey, Napa, Sacramento, San Diego, San Francisco, San Joaquin, San Luis Obispo, Santa Barbara, Santa Clara, Santa Cruz, Solano, Sonoma, Sutter, Trinity, Tuolumne, Yolo, and Yuba. California County Creation Dates and Parent Counties. Counties in 2020: 58

Resources