Liverpool River is a river in the Northern Territory of Australia. It is the largest of the tidal river systems of northern Arnhem Land, which includes two major tributaries, the Tomkinson and Mann Rivers.
The river rises at the eastern end of the Spencer Range and flows in a north-easterly direction, eventually discharging into the Arafura Sea south of Bat Island and to the south west of the Aboriginal Community of Maningrida. Its major tributaries are the Tomkinson and Mann Rivers.
The estuary formed at the river mouth is tidal in nature and in near pristine condition. The estuary at the river mouth occupies an area of 33.8 square kilometres of open water. It is tide dominated in nature with a tide dominated delta having single channel and is surrounded by an area of 60.8 square kilometres covered with mangroves.
The river has a catchment area of 8,280 square kilometres The catchment is wedged between the Goomadeer River catchment to the west, the Blyth River catchment to the east and the Roper River catchment to the south. It has a mean annual outflow of 3,810 gigalitres
