The Limmen Bight River is a 514 km long river in the Northern Territory, Australia.
The headwaters rise at the base of the Favenc Range. It then flows in a northerly direction, with many smaller tributaries feeding the river which forms a series of braided channels across the plains. It flows past Sculthorpe Pound and through Limmen Gate hemmed to the east by the Tawallah Range. It continues through Limmen National Park past the Four Archers near Burketown Crossing and eventually discharges in the Limmen Bight in the Gulf of Carpentaria. Fifteen tributaries join the river including October Creek, Balbirni Creek, Lansen Creek, Crooked Creek, Tyangkulta Creek, Cox River and Nathan River. It also flows through a large permanent billabong, Broadmere waterhole.
The catchment occupies an area of 15,938 square kilometres and is situated between the Roper River and Towns River catchments to the north and west, the McArthur River catchment to the south and the Rosie River catchment to the east. The river has a mean annual outflow of 1,160 gigalitres.
The rivers estuary, which occupies an area of 62.1 square kilometres of open water, is in near pristine condition. The tide-dominated delta has multiple channels and is surrounded by an area of 21.2 square kilometres covered with mangroves.
