| Named By: | Wang Li, Li Li, Duan Ye and Cheng Shaoinli in 2006 |
| Time Period: | Early Cretaceous, 120 Ma |
| Location: | China, Liaoning Province - Jiufotang Formation |
| Size: | Uncertain die to incomplete skull material, but a 2 meter wingspan has been suggested |
| Diet: | Piscivore |
| Fossil(s): | Partial skull and incomplete post cranial remains |
| Classification: | | Chordata | Reptilia | Pterosauria | Pterodactyloidea | Ornithocheiroidea | Istiodactylidae | |
Longchengpterus was a genus of istiodactylid pterodactyloid pterosaur from the Barremian-Aptian-age Lower Cretaceous Jiufotang Formation of Chaoyang, Liaoning, China. The genus was named in 2006 by Wang Li, Li Li, Duan Ye and Cheng Shao-li. The genus name is derived from the old name of Chaoyang City, Longcheng, and a Latinised Greek pteron, "wing". The specific name honours Zhao Dayu, the president of Shenyang Normal University and a contributor to the founding of the Western Liaoning Institute of Mesozoic Paleontology.