| Named By: | David B. Norman in 1998 |
| Time Period: | Early Cretaceous |
| Location: | Mongolia - Dornogovi Province - Khukhtek Formation (Huhteeg Svita) |
| Size: | Estimated between 6.5 and 8 meters long, Skull 76 centimetres long |
| Diet: | Herbivore |
| Fossil(s): | Partial skull and post cranial remains from at least five individuals, including two juveniles |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Ornithopoda | Iguanodontia | Hadrosauroidea | |
Altirhinus ("high snout") is a genus of iguanodontian ornithopod dinosaur from the Early Cretaceous Period of Mongolia.