The Susan River is a short river that flows in an easterly direction, south of Hervey Bay in Queensland. It is a tributary of the Mary River, joining the Mary River at River Heads in the Great Sandy Strait.
The Susan River bridge built for the road that links Maryborough and Hervey Bay, was built in 1977 and carries more than 10,000 vehicles each day. It remained unnamed until 2009.
In 2007, an unusual angler fish was found by a local fisherman. The fish was the first of its kind to have its genetic data recorded in an international fish catalog called the Fish Barcode of Life (FISH-BOL) using DNA barcoding.
Large saltwater crocodiles are occasionally seen the river and surrounding area, as well as dugongs, dolphins and sea turtles.
Coordinates: 25°26′S 152°56′E / 25.433°S 152.933°E