| Agwei River | |
|---|---|
 Sobat River basin | |
  Location of mouth in South Sudan | |
| Location | |
| Countries | South Sudan |
| Physical characteristics | |
| Mouth | |
• coordinates | 7°48′N 33°03′E / 7.8°N 33.05°E |
| Basin features | |
| River system | Pibor River |
The Agwei River or the River Agwei, also spelled Agvey, is a tributary of the Pibor River that flows through eastern South Sudan. Its own tributaries include the Abara and Kongkong rivers. The river is a wadi, or ravine, that may run dry during the dry season but quickly becomes a watercourse due to heavy rainfall during the wet season.