| Named By: | D. J. Simmons in 1965 |
| Time Period: | Early Jurassic, Sinemurian |
| Location: | China - Lufeng Formation |
| Size: | Unknown due to lack of fossil remains |
| Diet: | Herbviore |
| Fossil(s): | Partial left dentary (lower jaw) with teeth |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Thyreophora | |
Tatisaurus is a genus of ornithischian dinosaur from the Early Jurassic from the Lower Lufeng Formation in Yunnan Province in China. Little is known as the remains are fragmentary.