| Bityug | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 379km (235miles) |
| Mouth: | Don |
| Basin Size: | 8840km2 |
| Tributaries Left: | Ertil |
The Bityug (Russian: Битюг) is a river in Voronezh Oblast, Russia, a left tributary of the Don. Its upper reaches are located in Tambov Oblast. The Bityug is 379km (235miles) long, with a basin of 8840km2.[1] There are more than 400 lakes in the Bityug basin. The river freezes up in mid-December and stays icebound until late March or early April.