Nanshiungosaurus ("Nanxiong's lizard") is a genus of therizinosaurid theropod dinosaur that lived in South China during the Late Cretaceous period. It was discovered in the Nanxiong Formation, near the village of Dapingcun. Along with Therizinosaurus and Segnosaurus, Nanshiungosaurus was one of the earliest therizinosaurs to be described and named. It was at first classified as a sauropod before correctly being placed in 1992.

It was a relatively large-bodied therizinosaurid, and can be differentiated by the possession of stocky posterior-most cervical vertebrae with opisthocoel.