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
Map
Location
CountryVietnam
Physical characteristics
Length96 km (60 mi)
Basin features
River systemCầu River