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Sonoma County, California
Genealogy, History & Facts

Sonoma County, California Facts

Sonoma County

When was Sonoma County, CA Created?
Sonoma County was established on February 18, 1850 as one of the original 27 counties . This county was named for Sonoma is a Chocuyen Indian name translated by some as “Valley of the Moon” and by others as “land or tribe of the Chief Nose.”

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 .

What cities and towns are in Sonoma County, CA?
Cities and towns located in the County include Mendocino County (north), Lake County (northeast), Napa County (east), Solano County (southeast), Marin County (south), Contra Costa County (southeast) .

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 Certificate, Marriage or Divorce Certificate, Death 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 1850, 1860, 1870, 1880 (free index), 1890 (fragment), 1900, 1910, 1920, 1930, 1940.

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?
The below facts shows exactly what death, marriage, birth, property, wills, and court records are typically in Sonoma County. The years listed below are the first noted records with this county. Some counties encompass land settled in the eighteenth century; their records pre-date county formation. Land transactions and vital records recorded in the county are at the county recorder's office. The county clerk general has probate books and files from the county's superior court, civil court records, and naturalizations. Divorces may be in either place, depending on how filed. See Also California Corthouse Records Research Guide.

Old Sonoma County Courthouse
  • Sonoma County Courthouse (all departments listed below are located here, unless otherwise noted)
  • Sonoma County Recorder-Clerk is s responsible for examination and recording of all documents presented for recording that deal with establishing ownership of land in the County or as required by statute; administers the real property transfer tax law and maintains a permanent record and indexes of all documents for public viewing plus providing certified copies requested by the public; recording of all lawful documents such as deeds, deeds of trust, judgments, liens, affidavits, Uniform Commercial Code Financial Statements, etc; and the filing of Births, Deaths, and Marriages.
    • 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 has probate books and files from the county's superior court, civil court records, and naturalizations. Divorces may be here or in the Recorders Office, depending on how it was filed.
    • 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

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