The Harold Washington Library Center is the central library for the Chicago Public Library System. It is located just south of the Loop 'L', at 400 S. State Street in Chicago, in the U.S. state of Illinois. It is a full-service library and ADA compliant. As with all libraries in the Chicago Public Library system, it has free wifi internet service. The building contains approximately 756000sqft of space. The total square footage is approximately 972000sqft including the rooftop garden penthouse, according to the Zoning department of the city of Chicago.