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The library is open on Thursdays through Saturdays (10-2). See for info on Saturday visits, which have different procedures than weekdays. See our 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 Berkeley at 1841 Berkeley Way.

Phone: (510) 663-1358