Pentaceratops ( "five-horned face") is a ceratopsid herbivorous dinosaur genus from the Latest Cretaceous time of North America. It was about 8 m (27 ft) long, and almost surely weighed around 5,500 kg (13,000 lb). The first examples were found and described by Henry Fairfield Osborn in 1923, in New Mexico. The frill of Pentaceratops is better than that of Triceratops, with two big holes in it. In 1930, Carl Wiman described a next species of Pentaceratops, P. fenestratus, but this was later strong-minded to be the same species as the original finds.

Pentaceratops has the difference of being the species which the largest known skull for a land vertebrate belongs to. That skull and its linked skeleton are on display at the Sam Noble Oklahoma Museum of Natural History. The skeleton was establish in New Mexico in 1941.