San Marcos Branch Library serves 95,000 residents in the City of San Marcos, and it is part of the San Diego County Library System. The library system maintains 1.1 million volumes and circulates 11 million items per year. San Marcos Branch Library offers books, audiobooks, e-books, movies, CDs, online resources, public wireless internet access, public computers, 3D printing, a community room, copying, and printing services.