California Genealogical Society and Library

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Founded 1898
Location 2201 Broadway, Suite LL2 Oakland, California

The California Genealogical Society (CGS) is a non-profit, all-volunteer organization that seeks to aid, educate and encourage research in family history. The society offers research services, online one-of-a-kind genealogical indexes and databases, and a research library housing over 38,000 reference materials from California, the United States, and around the world. It is the oldest continually-operating genealogy society in California.[1]

The society's library is located in Oakland's historic Breuner Building at 2201 Broadway, Suite LL2. The library is rich in genealogy reference materials, both standard and unique, covering people and places in California and the rest of the country. CGS is a member of the Federation of Genealogical Societies (FGS).


The California Genealogical Society was founded on February 12, 1898,[2] in San Francisco by a group of New Englanders. The society moved from San Francisco to Oakland in 1997.[1]


The CGSL website features The California Names Index, a free, searchable database containing more than 350,000 names from state, county, and local references found in the library. It is an ongoing project and names are added regularly.


  1. ^ a b "Genealogical Society marks 110 years of researching family", The Oakland Tribune, 24 February 2008.
  2. ^ Proceedings of the New England Historic Genealogical Society, 1900

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