| Named By: | Sidney H. Haughton in 1915 |
| Time Period: | Early Cretaceous |
| Location: | South Africa |
| Size: | Unknown due to lack of fossil remains |
| Diet: | Herbivore |
| Fossil(s): | Teeth and partial hind limbs |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Ornithopoda | Dryosauroidea | Dryosauridae | |
Kangnasaurus (meaning "Farm Kangnas lizard") is a genus of iguanodontian ornithopod dinosaur found in supposedly Early Cretaceous rocks of South Africa. It is known from a tooth and possibly some postcranial remains. At times, it has been considered dubious or a valid genus. It was probably similar to Dryosaurus.