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Sonoma County, California
Genealogy, History & Facts

Sonoma County, California Facts

When was Sonoma County, CA Created?
Sonoma County was established on February 18, 1850.

What is the County Seat of Sonoma County, CA?
The County Seat is located in Santa Rosa also, the county government website is

What counties are adjacent to Sonoma County, CA?
Bordering Counties are Cloverdale, Cotati, Healdsburg, Petaluma, Rohnert Park, Santa Rosa, Sebastopol, Sonoma, Windsor .

Sonoma County, CA Vital Records

Where can find Sonoma County Birth, marriage, Divorce and Death Records?
Sonoma County vital records can be found at the California Office of Vital Records has copies of birth and death records from July 1905, marriage records that occurred from 1949-1986 and 1998-1999, divorce records that occurred between 1962 and June, 1984. There is a fee for each copy requested. Please refer to the information to the Statewide Vital Records in California for current fees and application process.

You can search online for Sonoma County Birth, Marriage, Divorce or Death Records. You can also Order Electronically Online or can download an application for California Birth CertificateMarriage or Divorce CertificateDeath Certificate Applications to mail.

Vital Records can also be found in the Local Registrar of Births and Deaths, 3313 Chanate Road, Santa Rosa, CA 95404; Office (707) 565-4700

Sonoma County, CA Census Records

What Sonoma County, CA census records are available?
There are many types of census records for Sonoma County guide you in researching your family tree. Federal Population Schedules are available for 1850186018701880 (free index)1890 (fragment)19001910192019301940.

Sonoma Co. Mortality Schedules can be found for 1850, 1860, 1870 and 1880. Sonoma Co. Industry and Agriculture can be obtained for 1850, 1860, 1870 and 1880. Sonoma Co. Union Veterans Schedules is available for 1890.

Another California census is the California State Census in 1852. One can find free online and printable census forms to help you with your research. See Also California Census Records Research Guide.

Sonoma County, CA Courthouse and Government Records

Sonoma County Courthouse

What genealogical records can I find in the Sonoma County Courthouse?

Researchers frequently overlook the great importance of Sonoma County court, probate, and land records data as a useful resource of ancestry and genealogy information. Buried away in California courthouses and archives everywhere are the ambitions and frustrations of countless California residents.

The possibilities are excellent that your forefathers have left a comprehensive document of at least a number of facets of their lives in the Sonoma County court records. Even if your forebears is not referred to in a Court case, contemplate all of the other procedures that could have lead to him or her to appear in court records. See Also California Corthouse Records Research Guide.

  • Sonoma County Courthouse (all departments listed below are located here, unless otherwise noted)
    • Address: 600 Administration Dr, Santa Rosa, CA 95403
    • Phone: (707) 565-3800
  • Sonoma County Recorder-Clerk
    • Address: 2300 County Center Drive, Suite B-177, Santa Rosa, CA 95403 OR Mail to: P. O. Box 1709, Santa Rosa, CA 95402
    • Phone: (707) 565-2645
    • Birth / Death Records: 1858 / 1873
    • Marriage Records: 1846
    • Land Records: 1841
  • Sonoma County Clerk of Superior Court
    • Probate Records: 1850
    • Court Records: 1848
  • Early California Wills
  • BLM Land Records

Sonoma County, CA Societies and Family History Resources

What genealogical and historical societies, archives, museums, associations and libraries are available for Sonoma County, CA?
A list of Sonoma County Historical  and Genealogical Societies, Libraries, Archives. See also list of Statewide Californiia Archives, Historical & Genealogical Societies.

Where can I connect with other Sonoma County, CA Researchers through message boards and forums?

What other genealogical resources are available in Sonoma County, CA?
The following are web links to Genealogy, Records and Resources pertaining to Sonoma County. A majority of these genealogy links fall into 3 categories: Business Sites, Private Sites or Organization Sites. Some have free access some require a payment. This is basically a listing which has been gathered or submitted. I do not recommend or promote one genealogy site above another.

Sonoma Co. CA Books, Newspapers & Publications

Sonoma Co. CA Cemeteries & Church Records

Sonoma Co. CA Family Websites, Pictures & Histories

Sonoma Co. CA General and History Websites

Sonoma Co. CA Maps, Atlases & Gazetteers

Sonoma Co. CA Military Records