Medusaceratops (meaning “Medusa horn face”) is a genus of herbivorous ceratopsian dinosaur. It is a chasmosaurine ceratopsian which lived during the Late Cretaceous period in what is now Montana. It is known from two partial parietals, the holotype WDC DJR 001 and the paratype WDC DJR 002. All specimens of Medusaceratops were collected from the Judith River Formation, dating to 77.5 million years ago. It is the oldest known chasmosaurine ceratopsid.
