Jiangxisaurus is an extinct genus of oviraptorid theropod dinosaur from the Late Cretaceous Nanxiong Formation of southern China.

This genus shares several traits with other oviraptorids, including a short narrow skull with a toothless jaw, and anterior cerivcal vertebrae that bear pleurocoels.

According to Wei et al. (2013), Jiangxisaurus was a medium-sized oviraptorid dinosaur characterized by the following unique characters: The only known specimen of this genus was recovered at the Nankang locality of the Nanxiong Formation in Ganzhou City of Jiangxi Province, China.

The specimen was collected in red sandstone sediments that were deposited during the Maastrichtian stage of the Cretaceous period, approximately 72 to 66 million years ago.

[2] Jiangxisaurus shared its paleoenvironment with the sauropod Gannansaurus, the duckbill Microhadrosaurus, the therizinosauroid Nanshiungosaurus, the tyrannosaurid Qianzhousaurus and other oviraptorids, Banji, ‘’Tongtianlong’’, ‘’Shixinggia’’,‘’Nankangia’’,‘’Corythoraptor’’,’’Huanansaurus’’ and Ganzhousaurus.