The Sebastopol Regional Library is a publicly funded library under the Sonoma County Library, serving more than 7,000 residents in the city of Sebastopol in Sonoma County, California. Built in 1916, the Sebastopol library was opened to address the increasing needs of its patrons. It contributes to the Sonoma County system's whole collection of resources, which includes more than one million volumes. Likewise, over 600,000 people visited the system's 14 sites annually, and more than four million items were circulated.