"Oshanosaurus" (meaning "Oshan lizard") is the informal name given to an as yet undescribed genus of dinosaur from the Early Jurassic. It was a herbivorous dinosaur which lived in what is now China around 190 million years ago. The type species, "Oshanosaurus youngi", was coined by Zhao in 1985, but has never been formally described. It has been variously identified as an ornithischian (heterodontosaurid) or a sauropod (cetiosaurid). "Oshanosaurus" may have been around 12 metres (40 feet) long and, if so, is unlikely to have been an ornithischian. Its fossils were found in the Yunnan Province of southwestern China.