The Red River Delta (Vietnamese: Dong Bang Song Hong) is the flat plain formed by the Red River and its distributaries joining in the Thai Binh River in northern Vietnam. The delta measuring some 15,000 square km is well protected by a network of dikes. It is an agriculturally rich area and densely populated. Most of the land is devoted to rice cultivation.

Eight provinces together with two municipalities, the capital Hanoi and the main port Hai Phong form the delta.