| Named By: | Z. Dong in 2001 |
| Time Period: | Early Jurassic |
| Location: | China, Yunnan Province |
| Size: | Unknown due to lack of fossil remains |
| Diet: | Herbivore |
| Fossil(s): | Partial skull, lower jaw and teeth |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Thyreophora | Ankylosauria | Scelidosauridae | |
Bienosaurus (meaning "Bien's lizard") was a dinosaur from the Early Jurassic (probably Sinemurian). The genus was an armoured dinosaur from the Lower Lufeng Formation in Yunnan Province in China.