Siluosaurus (meaning "Silu (Chinese for Silk Road, referring to the discovery location) lizard"[1]) is a genus of ornithischian dinosaur from the Barremian-Albian-age Lower Cretaceous Xinminbao Group of Gansu, China.

[1] The holotype teeth of Siluosaurus were recovered during the 1992 Sino-Japanese Silk Road Dinosaur Expedition in the lower portion of the Xinminbao Group.

The specific name honours Zhang Qian, the Chinese diplomat who reconnoitred the Silk Road in the second century B.C.

Fonseca et al. (2024) recovered this genus as an indeterminate member of Cerapoda in their supplementary material.

[3] As a hypsilophodontid or other basal ornithopod, Siluosaurus would have been a bipedal herbivore.