Black Diamond Library serves 4,700 residents in the City of Black Diamond. Opened in 2008, the library is part of the King County Library System. The library system maintains 3.2 million volumes and circulates 21 million items per year. Black Diamond Library offers books, e-books, audiobooks, movies, online resources, one meeting room, public computers, free Wi-Fi, copying, printing, scanning, and faxing services.