| Named By: | Othniel Charles Marsh in 1885 |
| Time Period: | Late Jurassic |
| Location: | USA |
| Size: | Average 6 meters long, but some larger individuals approached almost 8 meters long |
| Diet: | unavailable |
| Fossil(s): | Several specimens are known |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Ornithopoda | |
| Also known as: | | Brachyrophus altarkansanus | Camptonotus dispar | Camptosaurus browni | Camptosaurus medius | Camptosaurus nanus | Symphyrophus musculosus | |
Not to be confused with Camposaurus.
Camptosaurus ( KAMP-to-SAWR-as) is a genus of plant-eating, beaked ornithischian dinosaurs of the Late Jurassic period of western North America and possibly Europe. The name means 'flexible lizard' (Greek kamptos/kamptos meaning 'bent' and sauros/sauros meaning 'lizard').