| Named By: | Lu Junchang Yoichi Azuma Chen Rongjun Zheng Wenjie & Jin Xingsheng in 2008 |
| Time Period: | Late Cretaceous |
| Location: | China, Zhejiang Province - Fangyan Formation |
| Size: | Uncertain but estimated to be somewhere about 15 meters long |
| Diet: | Herbivore |
| Fossil(s): | Partial but articulated postcranial skeleton comprising 10 dorsal (back), and two caudal (tail) vertebrae as well as a complete pelvis |
| Classification: | | Chordata | Reptilia | Dinosauria | Saurischia | Sauropoda | Titanosauria | Saltasauridae | |
Dongyangosaurus is a genus of Saltasaurid sauropod dinosaur from the early Late Cretaceous. The only species is Dongyangosaurus sinensis, from which only a single fragmentary skeleton is known, coming from the Zhejiang province of eastern China. Like other sauropods, Dongyangosaurus would have been a large quadrupedal herbivore.