Zuoyunlong is an extinct genus of herbivorous ornithischian dinosaur belonging to the Hadrosauroidea, that lived during the Late Cretaceous in the area of present China. In 2015 the type species Zuoyunlong huangi was named and described by Wang Runfu, You Hailu, Wang Suozhu, Shichao Xu, Yi Jian, Xie Lijuan, Jia and Lei Xing Hai. The generic name refers to the prefecture of Zuoyun with the Chinese word long, "dragon". The specific name honors the Chinese paleontologist Huang Weilong.