Maryborough Post Office is a heritage-listed post office at 227 Bazaar Street, Maryborough, Fraser Coast Region, Queensland, Australia. It was designed by Charles Tiffin and built in 1865–1866. It was added to the Australian Commonwealth Heritage List on 8 November 2011. History Situated on the Mary River, Maryborough was first settled in the late 1840s and is one of Queensland's oldest cities. Many settlers to the region also entered the Colony of Queensland through the Port of Maryborough in the nineteenth century. Wool was an early local export, with the original Maryborough site, occupied until 1855, located between the Bruce Highway and the Mary River. Maryborough was a thriving township when it was proclaimed a municipality in 1861. In 1865 the Maryborough Sugar Company was set up and, when gold was discovered in 1867 at Gympie, Maryborough became one of the major access points to the fields. The Maryborough Post Office was constructed in this thriving period (1865-66) to designs prepared by Colonial Architect, Charles Tiffin. The post office is the oldest post office known to survive in Queensland, and is one of three remaining masonry post offices from the period between Queensland's separation from New South Wales in 1859 and the amalgamation of the post and telegraph departments in 1878. The Maryborough Post Office and the Rockhampton Post Office were designed concurrently and, due to the high cost of building materials in Rockhampton, the tender for construction of Rockhampton Post Office was exceeded. This problem was allegedly solved by the exchange of the less expensive Maryborough design with Rockhampton's. The elevations for Maryborough Post Office refer to Denham and East Streets (in Rockhampton), rather than Bazaar and Wharf Streets. The building constructed in Maryborough (Rockhampton's design) was designed for an eastern orientation rather than a western orientation, and hence it lacked the appropriate sun shading. In 1869 a single faced clock, facing Wharf Street, was installed in the third level of the tower. The Wharf Street loggia was enclosed in 1875-77 by contractors J and J Rooney to increase accommodation and improve lighting and ventilation. A further storey was added to the corner tower in 1879–80, allowing the installation of a four dialled clock and bells, which was officially started on 9 December 1879 (the clock was dismantled in 1935). The first country telephone exchange was opened in Maryborough in November 1882, and a new wing constructed to house