| Named By: | C. M. Sternberg in 1951 |
| Time Period: | 70 Ma Early Maastrichtian |
| Location: | USA, Montana - St Mary River Formation |
| Size: | Approximately 3 meters long |
| Diet: | Herbivore |
| Fossil(s): | Several specimens, usually of partial remains |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Cerapoda | Ceratopsia | Leptoceratopsidae | |
| Also known as: | | Leptoceratops cerorhynchos | |
Montanoceratops is an extinct genus of small ceratopsian dinosaur that lived approximately 70 million years ago during the latter part of the Cretaceous Period in what is now Montana and Alberta. Montanoceratops was a small sized, moderately-built, ground-dwelling, quadrupedal herbivore, that could grow up to an estimated 3 m (9.8 ft) long.