Crichtonsaurus (meaning "Crichton's lizard") is a genus of herbivorous ankylosaurid dinosaur that lived during the Late Cretaceous in what is now China.

The generic name is in honor of Michael Crichton, American author whose novels include Jurassic Park, The Andromeda Strain and others.

The specific name honours Birger Bohlin, a Swedish paleontologist who during the 1930s took part in several paleontological expeditions to China.

[4] In 2010, Gregory S. Paul estimated the body length of the Crichtonsaurus bohlini specimens at 3.5 metres, their weight at half a tonne.

Crichtonsaurus was a genus of armored dinosaurs, but it is unknown if the species possessed a tail club, which may have been a feature exclusive to the subfamily Ankylosaurinae.

[2] A second species, Crichtonsaurus benxiensis, was named by Lü Junchang, Ji Qiang, Gao Yubo and Li Zhixin in 2007.

The holotype, BXGMV0012, was discovered in the same early Late Cretaceous-age (Cenomanian-Turonian) Sunjiawan Formation of Beipiao, Liaoning, as the type species.