Our History

The Tuolumne County Genealogical Society was formed in November, 1979, and in January, 1980, a newsletter was started. One month later in February the library was opened in a room in a realty office.

By January, 1981 there were 72 members and the first quarterly publication called Mother Lode-Ore was produced. In 1982 the name of the quarterly was changed to Golden Roots of the Mother Lode.

An agreement with the Tuolumne County Historical Society in 1983 allowed the Genealogical Society to move its library to their archive building and share their space. That October the library was moved into its present location in the Museum building. The Genealogical Society operates the museum three days a week in return for library space.

Currently our Society has 156 members. Many library volunteers aid researchers and collect and index county records, including cemetery, courthouse, church and newspaper records. The Library has an amazing collection of records which visitors are encouraged to review.


old family
Young couple of the 1800 or 1900s

Who we are ~

Our Mission Statement:

The mission of the Tuolumne County (CA) Genealogical Society is to foster, encourage, and promote an interest in genealogy by providing information, education, and inspiration to our Society members and the general public.


What we are ~

We are a society incorporated as a 501(c)(3) organization, thus qualifying for tax deductible donations. We operate within the structure of a corporation with a Board of Directors and Officers. We have approximately 150 members, many of whom work tirelessly in our library. It is a space shared with the Tuolumne County Historical Society on alternating days. We are fully self-supporting; therefore, donations to help support our library expenses are always greatly appreciated.

TC Genealogical Library: 158 Bradford St., Sonora, California 95370 ~ 209.532.1317 ~ Email: info@tcgen.org