The library is open on Thursdays through Saturdays (10-2). See Directions and Parking for info on Saturday visits, which have different procedures than weekdays. See our Events and Education for online and in-person sessions.

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Connecting people to their diverse family heritage

Whether you have Gold Rush ancestors or have no family connection to California, you will find extensive support for your genealogy research at the California Genealogical Society (CGS) in Oakland. The society offers research services, online indexes and databases, and a research library housing over 38,000 reference materials from California, the United States, and around the world. CGS is a 501(c)(3) nonprofit corporation. The library is conveniently located in Uptown Oakland, one block north of the Paramount Theatre, at 2201 Broadway, Suite LL2. We are three blocks from the 19th Street BART Station.

Phone: (510) 663-1358

Non-Discrimination Statement

The goal of the California Genealogical Society is to connect people to their family heritage and to promote a spirit of diversity and inclusivity for our members and patrons. The California Genealogical Society does not tolerate discrimination in any form.

Courtesy Request

In order to maintain a welcoming and healthy environment, please refrain from using scented products at CGS events or in the library.

Photography Notice

California Genealogical Society (CGS) may take photographs, audio recordings, and video footage in our library, classrooms or events for historical records or publicity purposes. If you do not want to be photographed or filmed, it is the individual’s responsibility to 'opt out' by notifying the event leader or photographer at the event.

Overview of DNA Tests & Applications in Genealogical Research