| Named By: | Q. Ji, S. A. Ji & L.inJ.Zhang in 2009 |
| Time Period: | Early Cretaceous, 120 Ma |
| Location: | China, Liaoning Province - Jiufotang Formation |
| Size: | Estimated at about 10 meters long |
| Diet: | Carnivore |
| Fossil(s): | Very incomplete remains of the skull, dentary (lower jaw), a few vertebrae, hip and finger metarsals |
| Classification: | | Chordata | Reptilia | Dinosauria | Saurischia | Theropoda | Proceratosauridae | |
Sinotyrannus (meaning "Chinese tyrant") is a genus of large basal proceratosaurid dinosaur, a relative of tyrannosaurids which flourished in North America and Asia during the Jurassic and early Cretaceous periods. Sinotyrannus is known from a single incomplete fossil specimen including a partial skull, from the Early Cretaceous Jiufotang Formation of Liaoning, China. Though it is not much younger than primitive tyrannosauroids such as Dilong, it is similar in size to later forms such as Tyrannosaurus. It was much larger than contemporary tyrannosauroids; reaching a total estimated length of 9-10 m (30-33 ft), it is the largest known theropod from the Jiufotang Formation. The type species is S. kazuoensis, described by Ji et al., in 2009.