The City of Perth Library is a public library service provided by the City of Perth. The library is located on Hay Street, next to the Perth Town Hall. It is part of the redevelopment of Cathedral Square, located between St Georges Terrace and Hay, Barrack and Pier Streets. Prior to the completion of the current building in 2016, the library had been based at a number of locations, most recently 140 William Street in the Perth CBD. The City of Perth library is separate in operations from the other major library in Perth, the State Library of Western Australia at the Alexander Library Building.