| Wau River | |
| Pushpin Map: | South Sudan |
| Pushpin Map Caption: | Location of mouth in South Sudan |
| Subdivision Type1: | Country |
| Subdivision Name1: | South Sudan |
| Mouth Coordinates: | 7.05°N 27.2167°W |
The Wau River, or Wau Nahr (sometimes spelled Waw or Wow), is a river in South Sudan. It shares its name with Wau, the state capital of Western Bahr el Ghazal, where the river is located east of the international border with the Central African Republic.