| The (Great) Cumbung Swamp New South Wales | |
|---|---|
  The (Great) Cumbung Swamp | |
| Nearest town or city | Balranald |
| Coordinates | 34°22′27″S 143°57′10.8″E / 34.37417°S 143.953000°E |
The Cumbung Swamp, also known as the Great Cumbung Swamp, is a wetland made up of the ecosystems surrounding the junction of the Murrumbidgee and Lachlan Rivers in the South West Region of New South Wales. When it is at full capacity, the swamp supports a large population of migratory waterbirds as well as one of the largest reed swamps in the Murray Darling Basin.