| Named By: | Harry Govier Seeley in 1888 |
| Time Period: | Upper Jurassic, Kimmeridgian |
| Location: | England, Oxfordshire - Kimmeridge Clay Formation |
| Size: | Roughly about 3.5 meters long for the holotype individual, though fully grown adults were likely larger |
| Diet: | Herbivore |
| Fossil(s): | Partial skull and post cranial skeleton of a probable juvenile |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Ornithopoda | |
| Also known as: | | Camptosaurus prestwichii | |
Cumnoria is a genus of herbivorous iguanodontian dinosaur. It is a basal iguanodontian which lived during the upper Jurassic period (Kimmeridgian age) in what is now Oxfordshire, United Kingdom.