The Sonoma County Library is a medium-sized public library system that serves the nine cities and unincorporated areas of Sonoma County, California. The library system is a joint powers authority, with administration located at the Administrative Offices, 6135 State Farm Dr, Rohnert Park, CA 94928. History In 1859, a private library association established the Santa Rosa Library, founding what was the 14th public library in California. The Santa Rosa Library would be the ancestor of the Central Library of the Sonoma County Library system. Santa Rosa's second library building was dedicated in March 1904 with a Carnegie grant, although the 1906 earthquake damaged it badly. The library was rebuilt as the Santa Rosa Free Public Library and served Santa Rosa until 1960, when deferred maintenance forced the City of Santa Rosa to condemn the old Carnegie library; the Santa Rosa Public Library was housed for several years in temporary quarters in downtown Santa Rosa. Private and municipal libraries were also established in towns throughout Sonoma County from the mid-19th century, onward, including Petaluma (1858), Cloverdale (1884), Healdsburg (1896), Sonoma (1903), Sebastopol (1916) and Guerneville (1924). In 1945, Sonoma County Free Public Library was founded. By 1950, the new system included a Central Library and four branches, a bookmobile, and many outlets, among them 80 school libraries. The Santa Rosa Public Library merged with the Sonoma County Free Public Library in 1965, and the Sonoma County Board of Supervisors designated the combined organization as official archives for the county. A new Santa Rosa Central Library opened in 1967, to replace the old Carnegie Library. The new library included the “California Room”; this became the core of the Sonoma County History and Genealogy Library collection. Between 1967 and 1975, an additional Santa Rosa Library opened, the Northwest Library, adjacent to Coddingtown Mall (1968), and a new library was built in Sebastopol (1974) to replace the old Carnegie library damaged in a 1969 earthquake. In 1975, a county-wide Library Joint Powers Agreement was signed, uniting all public libraries in Sonoma County in one system. This served the library system until 2014, when a revised Library Joint Powers Agreement was approved and instituted that included representation from all nine Sonoma County cities and the County of Sonoma. During this period, new library buildings opened in Petaluma (1976), Healdsburg (1988) and Guerneville (1988); additional library branches opened in Santa Rosa's Rincon Valley (1994) and Windsor