 At the 2016 census, Boyne Island had a population of 4,760.It is located on the west bank of the Boyne River and, is a particular type of island called a holm, an island in a river or an estuary.It is bounded on the Eastern side by the Boyne River, for about 4 km and the South Trees Inlet, on the southern, for 9 km, and western sides, for about 8 km Tannum Sands is located on the Eastern side of the mouth of the Boyne River spreading southward and is often referred to as Boyne Island's twin town.