| Named By: | R. J. Butler in 2005 | 
| Time Period: | Early Jurassic, 199-189 Ma | 
| Location: | South Africa - Upper Elliot Formation | 
| Size: | Uncertain due to lack of post cranial remains | 
| Diet: | Herbivore | 
| Fossil(s): | Partial skull material | 
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Genasauria | Lesothosauridae | | 
Lesothosaurus was a type of omnivorous ornithischian dinosaur. It was named by paleontologist Peter Galton in 1978, the name meaning "lizard from Lesotho". The genus has only one valid species, Lesothosaurus diagnosticus.