The Rohnert Park Cotati Regional Library serves over 44,320 residents in the City of Rohnert Park and is a part of the Sonoma County Library. The Library System maintains approximately one million volumes and circulates 4.1 million items per year. Established in 1946, the Rohnert Park Cotati Regional Library occupies a 24,000-square-foot building and is open seven days a week. It holds 100,000 titles and provides public computers, a community room, a conference room, a Friends of the Library bookstore, printing services, and a variety of library events for all ages.