Parramatta River

The Parramatta River is an intermediate tide dominated, drowned valley estuary located in Sydney, New South Wales, Australia. The Parramatta River is the main tributary of Sydney Harbour, a branch of Port Jackson. Secondary tributaries include the smaller Lane Cove and Duck rivers.

The river begins at confluence of Toongabbie Creek and Darling Mills Creek west of Parramatta and travels in an easterly direction to a line between Greenwich Point, Greenwich, and Robinsons Point, Birchgrove. Here it flows into Port Jackson, about 21 kilometres (13 mi) from the Tasman Sea.

The total catchment area of the river is approximately 252.4 square kilometres (97.5 sq mi) and is tidal to Charles Street Weir in Parramatta, approximately 30 kilometres (19 mi) from the Sydney Heads.

The land adjacent to the Parramatta River was occupied for many thousands of years by the Burramattagal, Toongagal, Wallumattagal, Wangal, and Wategora Aboriginal peoples. They used the river as an important source of food and a place for trade.