The Ultimo Road railway underbridge is a heritage-listed former railway bridge located on the former Darling Harbour goods railway line in the inner city Sydney suburb of Ultimo in the City of Sydney local government area of New South Wales, Australia. It was designed by engineering staff in the Existing Lines branch of the New South Wales Public Works Department and built in 1879. The property is owned by RailCorp, an agency of the Government of New South Wales. It was added to the New South Wales State Heritage Register on 2 April 1999.