The California Genealogical Society (CGS), organized in San Francisco on February 12, 1898, is the premier genealogical resource in Northern California. The Library is rich in genealogy reference materials, both standard and unique, covering people and places in California and the rest of the country. 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.