Kowmung River
| Kowmung Dryander River  | |
|---|---|
| Etymology | Aboriginal: gummung meaning "sore eyes" | 
| Native name | 
  | 
| Location | |
| Country | Australia | 
| State | New South Wales | 
| Region | Sydney Basin (IBRA), Central Tablelands | 
| Local government areas | Oberon, Blue Mountains | 
| Physical characteristics | |
| Source confluence | Hollanders River and Tuglow River | 
| • location | Tuglow, near Shooters Hill | 
| • elevation | 941 m (3,087 ft) | 
| Mouth | confluence with the Coxs River | 
 • location  | west of Mount Cookem | 
 • elevation  | 125 m (410 ft) | 
| Length | 74 km (46 mi) | 
| Basin features | |
| River system | Hawkesbury-Nepean catchment | 
| Tributaries | |
| • left | Morong Creek, Hanrahans Creek, Doris Creek, Christys Creek, Gingra Creek | 
| • right | Redcliff Creek, Waterfall Creek | 
| National parks | Kanangra-Boyd, Blue Mountains | 
The Kowmung River (Gandangara: Barnalay), a perennial river that is part of the Hawkesbury-Nepean catchment, is located in the Central Tablelands region of New South Wales, Australia.