| Koolatong | |
| Map Size: | 250 |
| Pushpin Map: | Australia Northern Territory |
| Pushpin Map Size: | 250 |
| Pushpin Map Caption: | Location of the Koolatong River mouth in the Northern Territory |
| Subdivision Type1: | Country |
| Subdivision Name1: | Australia |
| Subdivision Type2: | Territory |
| Subdivision Name2: | Northern Territory |
| Length: | 92km (57miles) |
| Discharge1 Avg: | 25.4m3/s |
| Source1: | Mitchell Ranges |
| Source1 Location: | Arnhem Land, Australia |
| Mouth Location: | Australia |
| Mouth Coordinates: | -13.2103°N 135.9239°W |
| Mouth Elevation: | 0m (00feet) |
| Basin Size: | 7913km2 |
| Extra: | [1] |
The Koolatong River is a river in the Northern Territory, Australia.
Rising in the Mitchell Ranges the river initially flows north then turns east across the uninhabited plains eventually discharging into the Saint Nicholas Inlet and the Blue Mud Bay then into the Gulf of Carpentaria.
The catchment occupies an area of 7913km2 and is situated between the Buckingham River catchment to the north, the Walker River catchment to the south and the Goyder River catchment to the west.[2] The river has a mean annual outflow of 800GL.[3]
The estuary formed at the river mouth is in near pristine condition.[4] The estuary occupies an area of 23.7ha of open water. It is river dominated in nature with a tide dominated delta having a single channel and is surrounded by an area of 51.3ha covered with mangroves.[5]
The traditional owners of the area are the Murngin, also known as the Yolngu peoples.[6]