Jinzhousaurus is a genus of hadrosauroid dinosaur of the Early Cretaceous of China.

The specific name honours Yang Zhongjian is the founder of Chinese paleontology.

[1] Its fossil, holotype IVPP V12691, was found near Baicaigou in Yixian County in the Dawangzhangzi Beds of the Yixian Formation in Liaoning, China, having an oldest determinable age of 122 million years, during the early Aptian stage of the early Cretaceous Period.

The back of the skull was uncommonly wide with a small crest on top.

Originally assigned to (an already understood to be paraphyletic) Iguanodontidae, later authors have referred it to the more general Iguanodontoidea.