Tuolumne County, California GenealogyEdit This Page

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United States Gotoarrow.png California Gotoarrow.png Tuolumne County


County Courthouse

Quick Facts

Wikipedia has more about this subject: Tuolumne County, California

Parent County

18 February 1850: Tuolumne County was created as an original county. County seat: Sonora [1]

Boundary Changes

Record Loss


Populated Places

Neighboring Counties


Archives and Libraries

The official records of Tuolumne County, one of California's 27 original counties, are located in the Carlo M. De Ferrari Archive. The building was designed in 1997 by Cooper Kessel, an East Sonora architect and built by Barham Industrial Constructors, Inc. in 1999.  It was dedicated for public use on December 21, 1999, and officially opened on June 8, 2001

Address:  490 Greenley Rd., Sonora, Ca 95370

Phone: 209 536-1163

Email Contacts:  cdyer@co.tuolumne.ca.us   or www.tuolumnecounty.ca.gov

Hours:  By appointment, Monday through Friday

The archive was named in honor of Carlo M. De Ferrari, a third generation Tuolumne County native son and "Official Historian of Tuolumne County," a title bestowed in 1972 by the Tuolumne County Board of Supervisors in reocognition of his extensive knowledge of local history and his dedication to its preservation. 

The county archivist oversees general administration of the archive.  All records accepted for preservation in the archive must have a historical connection to official county governmental business. 

Over 250,000 records from this collection have been entered into the Archive's database for the public to access and query.  The public can access the collection via the Tuolumne County's website at the following portal.  

Carlo M. De Ferrari Archive (Tuolumne County Archive) 

To begin searching the archives, click the Archive Index button.
  The User Id for the public is Research; no Password is needed.

    Click the Enter button, then click Archives from the drop down list.

       Press Go.

Tuolumne County Library Website

The current listing of books is available via the internet on the Tuolumne County Library web page. The books are available for researchers at the archive as reference material.


Church History and Records

Court Records

Historical Society

The Tuolumne County Historical Society, established in 1956, is home to the Tuolumne County Museum, Tuolumne County Historical Society and the Tuolumne County Genealogical Society.


Land and Property



Early migration routes to and from Tuolumne County, California Genealogy for emigrant settlers included:[2][3]

Military History and Records


Probate Records


Vital Records

Societies, Libraries and Museums



  1. The Handybook for Genealogists: United States of America,10th ed. (Draper, UT:Everton Publishers, 2002).
  2. National Park Service, "California Trail" (map) in California National Historic Trail at http://www.nps.gov/cali/planyourvisit/upload/CALImap1-web.pdf (accessed 5 August 2011).
  3. Wikipedia contributors, "California Trail" in Wikipedia: the Free Encyclopedia at http://en.wikipedia.org/wiki/California_Trail (accessed 5 August 2012).


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