The Altadena Library District is an independent special district that serves the residents of Altadena, California, an unincorporated community north of Pasadena in the San Gabriel Valley of Los Angeles County. The district was formed in December 1926 under the provision of Sections 19600-19734 of the California Education Code. The district is supported by property taxes and governed by a locally elected Board of Library Trustees. according to a May, 2005 California State Department of Finance estimate, the District provides library services to a population of approximately 54,876 people.
The system includes the main branch located at 600 E. Mariposa St., and the Bob Lucas Memorial Branch Library and Literacy Center located at 2659 Lincoln Avenue. In addition to the board and the staff, the Altadena Library has an active Friends of the Library which conducts an annual book sale and has a permanent store inside the library. The library has many special programs including summer reading programs, adult book clubs, wifi, a career center, the literacy center and a community room.