A new public library built with money from Andrew Carnegie, was opened next to the museum on Leeming Street, in 1905. A second storey was added later and the building remained a library until 1977. In this year Queen Elizabeth II opened a new Central Library in West Gate.
The Carnegie Library was later used as Mansfield Community Arts Centre and renamed the Old Library in 1976. In 2007 the building became the base for County Youth Arts.