Nedoceratops (meaning "insufficient horned face") is a controversial genus of ceratopsid dinosaur from the Late Cretaceous period Lance Formation of North America.

Its status is the subject of ongoing debate among paleontologists: some authors consider Nedoceratops a valid, distinct taxon, while others consider it to be an unusual specimen of Triceratops.

[1] The nearly complete skull USNM 2412, the holotype specimen of Nedoceratops hatcheri, was found in eastern Wyoming in 1891, in Niobrara County near Lightning Creek.

Nedoceratops belonged to the Ceratopsia (the name is Latinised Greek for "horned faces"), a group of herbivorous dinosaurs with parrot-like beaks which thrived in North America and Asia during the Cretaceous Period, which ended roughly 66 million years ago.

[2] A follow-up study by Leonardo Maiorino and colleagues in 2013[10] using morphometrics found support for Triceratops and Torosaurus being distinct, valid taxa, with Nedoceratops occupying variable positions with respect to the other two but generally outside the range of variation, concluding that "the size of USNM 2412 is a plausible intermediate, but the shape is not.

"[10] Another supposed difference between Nedoceratops and fossils referred to Triceratops horridus is the remarkably short, rounded nasal "horn".

Scanella and Horner proposed that the nasal horn of the USNM 2412 skull could have been lost when the animal was alive or when it became fossilized.

This, along with the fact that the entire skull can be seen to be twisted when seen head-on, have been used to argue that these features result from post-mortem distortion of the fossil, rather than reflecting the anatomy of the animal during life.