The Historical Society of Long Beach (HSLB) was formed in 1962 with the mission to collect, preserve, and present the city’s history. Throughout the years the HSLB has occupied many locations around the city, settling at its current location in Bixby Knolls in 2007. Operations are sustained at the HSLB by grant funding, membership dues, and community fundraising through programs and events.

The Library has a large collection of manuscripts, printed books and periodicals, photographs, maps and ephemera relating to Los Angeles.

The Japanese American Cultural and Community Center preserves and encourages appreciation of Japanese and Japanese American heritage and culture. The center's Franklin D. Murphy Library has a comprehensive collection of books in English and Japanese about the Japanese community in the United States. The library also holds books in English and Japanese about Japan and about Japanese culture, arts,…

The June L. Mazer Lesbian Collection, formerly the West Coast Lesbian Collections, was founded in Oakland, California, in 1981. Six years later it was moved to Los Angeles by Connexxus Women's Center/Centro de Mujeres, and it acquired its present name in 1987 after the death of June L. Mazer, a community activist and an invaluable supporter of the collection.