| Donguz | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Mouth: | Ural |
| Mouth Coordinates: | 51.7401°N 54.7576°W |
| Length: | 95km (59miles) |
| Basin Size: | 1240km2 |
The Donguz (Russian: Донгуз) is a river in Orenburg Oblast, Russia, a left tributary of the Ural River. It is long, and has a drainage basin of .
The settlement of Pervomaysky and the Donguz test site are by the river.
The outcrops on the banks of the river (Donguz Formation) are of interest for palaeontology, and a number of discoveries have been made there.