The mission of the San Luis Obispo County Library is to provide materials and services to people seeking knowledge, lifelong learning, and recreation, as well as to ensure that all patrons of the library may use those materials and services to the maximum extent possible. The San Luis Obispo County Library was established in 1919 under authority of the County Free Library Act. The Library is a San Luis Obispo County department operating under the authority of the County Board of Supervisors. Today the library provides service to residents of 6 of the 7 incorporated cities and the unincorporated areas of San Luis Obispo County, a service area that extends over 3,000 square miles.
The San Luis Obispo County Library's digital collection at California Revealed consists of moving images from the 1930s. The collection includes promotional films about San Luis Obispo and Cambria, as well as footage of the 1939 La Fiesta Parade in San Luis Obispo.