Castlewood Library serves 108,400 residents in the City of Centennial, and it is part of the Arapahoe Library District. The library system maintains 425,000 volumes and circulates 4.5 million items per year. Castlewood Library offers books, movies, DVDs, online resources, one meeting room, one study room, a maker space, public computers, wireless internet access, copying, printing, scanning, and faxing services.