The Boyne River is a river in Central Queensland, Australia. The headwaters of the river rise in the Bobby Range, within the Great Dividing Range southwest of. The river descends from the western slopes of the range and flows generally north by east parallel with the Gladstone-Monto Road through the Boyne Valley. The river enters Lake Awoonga where it flows east by north, crossed by the Bruce Highway near Riverview, and finally discharging into the Port Curtis and the Coral Sea. The river descends 371 m over its 125 km course, joined by thirteen tributaries from source to river mouth. The mouth is located between the twin towns of Boyne Island and Tannum Sands. A bridge was built to cross the river joining the two towns in 1980. The river is dammed by the Awoonga Dam which is the major water source for the Gladstone region. The river has a catchment area of 2496 km2 of which 49 km2 are riverine wetlands and 17 km2 are estuarine wetlands. The Queensland Department of Environment and Heritage Protection consider the Boyne River to be the southern habitat extent of the saltwater crocodile. However, crocodiles can occasionally be found as far south as the Mary River. The river was named in 1823 by John Oxley as it reminded him of the River Boyne in Ireland.