| Named By: | C. C. Young (Yang Zhongjian) in 1942 |
| Time Period: | Early Jurassic , 201-168 Ma |
| Location: | China, Yunnan Province - Lufeng Formation. Y. huangi is known from the Zhangjiawa Member, while Y. youngi is known from the Shawan Member |
| Size: | Yunnanosaurus huangi estimated at about 7 meters long, Yunnanosaurus youngi estimated at about 13 meters long |
| Diet: | Herbivore |
| Fossil(s): | Y. huangi known from two skulls and the post cranial skeletal remains of over twenty individuals. Y. youngi. Known from a partial post cranial skeleton |
| Classification: | | Chordata | Reptilia | Dinosauria | Saurischia | Sauropodomorpha | |
| Also known as: | | Yunnanosaurus robustus | |
Yunnanosaurus ( EW-nan-o-SAWR-as) is an extinct genus of sauropodomorph dinosaur that lived approximately 201 to 168 million years ago in what is now the Yunnan Province, in China. Yunnanosaurus was a large sized, moderately-built, ground-dwelling, quadrupedal herbivore, that could also walk bipedally, and ranged in size from 7 meters (23 feet) long and 2 m (6.5 ft) high to 4 m (13 ft) long in the largest species.