Feilongus is an extinct genus of ctenochasmatid pterodactyloid pterosaur from the Barremian–Aptian-age Lower Cretaceous Yixian Formation of Beipiao, Liaoning, China.

The genus was named and described in 2005 by Wang Xiaolin, Alexander Kellner, Zhou Zhonghe and Diogenes de Almeida Campos. The type species is Feilongus youngi. The genus name is derived from Feilong, the "flying dragon". The specific name honors the Chinese paleontologist Yang Zhongjian (C. C. Young).

Artist's reconstruction of the head of Feilongus yongi, a pterodactyloid pterosaur
Artist's reconstruction
Feilongus is based on holotype IVPP V-12539, a skull and articulated mandible, with on the same plate the detached posterior braincase, of a subadult individual. The fossil is strongly crushed.

In 2014, a second specimen, DNMHM D3068 found at Gonggao, was referred to a Feilongus sp. It consists of a skull with lower jaws and four neck vertebrae. It was a possible subadult or, despite a smaller size, adult.