Shuangmiaosaurus is a genus of herbivorous ornithischian dinosaur which lived during the late Albian age of the Early Cretaceous Period, about 100 million years ago.

The generic name refers to the village of Shuangmiao in Beipiao in Liaoning Province, the site of the discovery.

[2] The holotype, specimen LPM 0165, was found in the Sunjiawan Formation, originally seen as dating to the Late Cretaceous (Cenomanian to Turonian) but today considered to have been somewhat older.

[3] Shuangmiaosaurus was originally considered a basal member of the Hadrosauroidea, one closely related to the Hadrosauridae.

Subsequent authors, including David B. Norman of Cambridge University, consider it a more basal member of the Iguanodontia outside of the Hadrosauroidea.