| Agwei River | |
| Map: | Sobat OSM.png |
| Pushpin Map: | South Sudan |
| Pushpin Map Caption: | Location of mouth in South Sudan |
| Subdivision Type1: | Countries |
| Subdivision Name1: | South Sudan |
| Mouth Coordinates: | 7.8°N 33.05°W |
| 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.
