| Named By: | You H.inL. & Dong Zhiming in 2003 |
| Time Period: | Unavailable |
| Location: | Mongolia |
| Size: | Uncertain due to lack of remains |
| Diet: | Herbivore |
| Fossil(s): | Partial skull and mandibles |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Ceratopsidae | Protoceratopsidae | |
Magnirostris, from the Latin magnus "large" and rostrum "beak", is the name given to a genus of dinosaur from the Late Campanian epoch in the Late Cretaceous. It was a ceratopsian which lived in Inner Mongolia in China. It is distinguished from other protoceratopsids by its large beak (hence the name) and incipient orbital horn cores.