The first federal census conducted in California was taken in 1850, while the Gold Rush was in full swing. Adventurers were pouring into the state, and they were very mobile in their search for the next paydirt. As a result, the accuracy of the count was questionable. Also, records for the counties of Contra Costa, San Francisco, and Santa Clara were lost or destroyed.
To obtain a more reliable picture of the population, the State of California conducted its own census in 1852, the only one in the state’s history. The original census is housed at the State Archives, but it is available on microfilm in the California History Room. Because the microfilm is difficult to read, the Daughters of the American Revolution of California created a transcription of the census, as well as an index. The California History Room has both print and microfilm copies of the transcription.
1850 United States Census for California
- Los Angeles County California (hosted at USGenWeb Archives)
- Marin County California (hosted at Marin County California USGenWeb)
- Mariposa County California (hosted at Mariposa Co., California USGenWeb)
- Mendocino County California (hosted at Mendocino Co., California USGenWeb)
- Monterey County California (hosted at Monterey County California USGenWeb)
- Napa County California (hosted at USGenWeb Archives)
- San Diego County California (hosted at USGenWeb Archives)
- San Luis Obispo County California (hosted at USGenWeb Archives)
- Santa Barbara County California (images hosted at USGenWeb Census Project)
- Santa Barbara County California (hosted at USGenWeb Archives)
- Santa Cruz County California (hosted at USGenWeb Archives)
- Shasta County California (Index hosted at Shasta County Resources)
- Sonoma County California (hosted at Sonoma County California USGenWeb)
- Yolo County California (Images hosted at USGenWeb Census Project)
- See Census Images Online for ALL Counties!
1852 State Census for California
- Klamath County California (hosted at Klamath County California USGenWeb )
- Tulare County California (hosted at Tulare County USGenWeb Project)
1860 United States Census for California
- Alameda County California Census (hosted at USGenWebArchives)
- Butte County California (Index hosted at Butte County California USGenWeb)
- Humboldt County California (hosted at USGenWeb Archives)
- Klamath County California (hosted at Klamath County California USGenWeb )
- Los Angeles County California Census
- Marin County California (hosted at Marin County California USGenWeb)
- Mariposa County California Census
- Mendocino County California (hosted at Mendocino Co., California USGenWeb)
- Hornitos (index hosted at Mariposa Co., California USGenWeb)
- Napa County California Census
- San Luis Obispo County California (images hosted USGenWeb Census Project)
- Hot Springs (hosted at Napa County California USGenWeb Archives)
- San Luis Obispo County California (hosted at USGenWeb Archives)
- Santa Barbara County California (images hosted USGenWeb Census Project)
- Shasta County California (Index hosted at Shasta County Resources)
- Tulare County California (hosted at Tulare County USGenWeb Project)
- See Census Images Online for ALL Counties!
1870 United States Census for California
- Alameda County California Census (hosted at USGenWebArchives)
- Butte County California (Index hosted at Butte County California USGenWeb)
- Inyo County California (hosted at USGenWeb Archives)
- Kern County California (hosted at USGenWeb Archives)
- Klamath County California (hosted at Klamath County California USGenWeb )
- Lake County California (hosted at USGenWeb Archives)
- Lassen County California (hosted at USGenWeb Archives)
- Marin County California Census (hosted at USGenWebArchives)
- Mendocino County California (hosted at Mendocino Co., California USGenWeb)
- Merced County California (hosted at USGenWeb Archives)
- Santa Clara County California Census (hosted at USGenWebArchives)
- Shasta County California (Index hosted at Shasta County Resources)
- Tulare County California (hosted at Tulare County USGenWeb Project)
- See Census Images Online for ALL Counties!
1880 United States Census for California
- Alameda County California Census
- Alpine County California (hosted at USGenWebArchives)
- Murray (hosted at Livermore-Amador Geneagical Society)
- Madera County California Census Tulare County California (hosted at Tulare County USGenWeb)
- District 1 (Present day Fresno County hosted at Madera County California USGenWeb)
- Ventura County California Census (hosted at USGenWebArchives)
- See Census Images Online for ALL Counties!
1890 United States Census for California
- Sonoma County California Census Reconstructed
- See Census Images Online for ALL Counties!
1900 United States Census for California
- Shasta County California (Index hosted at Shasta County Resources)
- Tulare County California (hosted at Tulare County USGenWeb)
- Ventura County California Census (hosted at USGenWebArchives)
- See Census Images Online for ALL Counties!
1910 United States Census for California
- Shasta County California (Partial hosted at Shasta County Resources)
- Tulare County California (hosted at Tulare County USGenWeb)
- See Census Images Online for ALL Counties!
1920 United States Census for California
- Shasta County California (Partial hosted at Shasta County Resources)
- See Census Images Online for ALL Counties!
1930 United States Census for California
California Census Information
California QuickFacts from the US Census Bureau