The Công River (Vietnamese: 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.
| Cong River | |
|---|---|
 Cong River at Sông Công | |
| Location | |
| Country | Vietnam |
| Physical characteristics | |
| Length | 96 km (60 mi) |
| Basin features | |
| River system | Cầu River |
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