| Unzha | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 426km (265miles) |
| Mouth: | Volga |
| Mouth Location: | Gorky Reservoir |
| Mouth Coordinates: | 57.5628°N 43.4959°W |
| Basin Size: | 27800km2 |
The Unzha (Russian: Унжа) is a river in the Vologda and Kostroma oblasts of Russia. It is a tributary of the Volga. It is 426km (265miles) long, and its basin covers 27800km2.[1] The Unzha begins at the confluence of the rivers Kema and the Lundonga. It flows into the Unzhensky Cove of the Gorky Reservoir.
The Unzha freezes up between October and December and stays under the ice until April or May. The main tributaries are the Viga, Neya, and the Mezha. The towns of Kologriv, Manturovo and Makaryev are along the Unzha River.