| Named By: | Richard Butler et al in 2010 |
| Time Period: | Late Jurassic, 150 Ma |
| Location: | USA, Morrison Formation, Coloradao, Fruita |
| Size: | 65-75 centimetres long |
| Diet: | unavailable |
| Fossil(s): | Several individuals of partial skeletons |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Heterodontosauridae | |
Fruitadens is a genus of heterodontosaurid dinosaur. The name means "Fruita tooth", in reference to Fruita, Colorado (USA), where its fossils were first found. It is known from partial skulls and skeletons from at least four individuals of differing biological ages, found in Tithonian (Late Jurassic) rocks of the Morrison Formation in Colorado. Fruitadens is the smallest known ornithischian dinosaur, with young adults estimated at 65 to 75 cm (26 to 30 in) in length and 0.5 to 0.75 kg (1.1 to 1.7 lb) in weight. It is interpreted as an omnivore and represents one of the latest-surviving heterodontosaurids.