| Named By: | Barnum Brown in 1912 |
| Time Period: | Maastrichtian, 70-68.5 Ma |
| Location: | Canada - Alberta - Horseshoe Canyon Formation. Mongolia - Nemegt Formation. Possibly also USA - California - Moreno Formation and China - Heilongjiang Province |
| Size: | Between 10 and 12 meters long, depending upon species |
| Diet: | Herbivore |
| Fossil(s): | Many skulls and skeletons, some of which are almost complete. Skin impressions are also known |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Ornithopoda | Hadrosauridae | Saurolophinae | |
Saurolophus (meaning "lizard crest") is a genus of large saurolophine hadrosaurid dinosaurs that lived about 70.0-68.5 million years ago, in the Late Cretaceous of North America and Asia; it is one of the few genera of dinosaurs known from multiple continents. It is distinguished by a spike-like crest which projects up and back from the skull. Saurolophus was a herbivorous dinosaur which could move about either bipedally or quadrupedally.
The type species, S. osborni, was described by Barnum Brown in 1912 from Canadian fossils. A second valid species, S. angustirostris, is represented by numerous specimens from Mongolia, and was described by Anatoly Konstantinovich Rozhdestvensky.