The Luan River is a river in China. It flows northwards from its source in the province of Hebei into the province of Inner Mongolia, and then flows southeast back into Hebei to its mouth on the Bohai Sea. Its length is about 600 km. One subsidiary of the Luan River is the Yixun He, which runs through Hebei.
The largest city on the course of the river is Chengde.