The Downtown and Business Branch Library serves 302,898 residents in the City of Pittsburgh, Allegheny County. It is part of the Carnegie Library of Pittsburgh – Brookline, which maintains 1.5 million volumes and circulates 3.4 million items per year. The Downtown Library is housed in a 21,400-square-foot building and is ADA-accessible. It offers meeting rooms, workstations, and programs for children, teens, and adults.