| Cong River | |
| Subdivision Type1: | Country |
| Length Km: | 96 |
The Công River (vi|Sông Công) is a tributary of the Cầu River in northern Vietnam. It flows through Thái Nguyên Province. The river is 96 km in length and has a catchment area of 951 square kilometres. It flows from Núi Cốc Lake and also passes through the town of Sông Công.