Yanbeilong (meaning "north of Yanmen Pass dragon") is an extinct genus of stegosaurian dinosaur from the Early Cretaceous (Albian) Zuoyun Formation of Shanxi, China.

[1][2][3] The Yanbeilong holotype specimen, SXMG V 00006, was discovered in 2011 in sediments of the Zuoyun Formation near Madaotou Township in Zuoyun County of Datong City, Shanxi Province, China.

[1] In 2024, Jia et al. described Yanbeilong ultimus as a new genus and species of stegosaur based on these fossil remains.

The specific name, "ultimus", is a Latin word meaning "last", referencing the fact that this taxon represents a late-surviving member of the stegosaur lineage.

[1] Jia et al. (2024) recovered Yanbeilong as a deeply-nested member of the Stegosauria, as the sister taxon to a clade containing Stegosaurus stenops and Wuerhosaurus.