Maryborough Courthouse is located at 170 Richmond Street, Maryborough in Queensland, Australia. It has been in continuous use by the supreme, district and magistrates courts of Queensland since it was completed in 1878, making it the longest serving and oldest courthouse in use in the state.
The complex was the first large court building designed for a rural town in Queensland. It was the forerunner for several other buildings in regional areas. The building is rectangular in form with corner towers and connecting verandahs, and was constructed in rendered brick, with timber work forming the verandahs. The building stands as part of the historic Wharf Street precinct in central Maryborough and is included on both the Register of the National Estate and the Queensland Heritage Register.