The Duck River is a watercourse located in Sydney, New South Wales, Australia. The Duck River flows in a generally north then east-north-east direction for about 11.5 km from where it rises from a drain in the suburb of Birrong to where it joins the Parramatta River at Silverwater. It was named in 1788 due to the abundance of ducks in the area. A'Beckett Creek flows into the Duck River near the M4 Western Motorway overpass.