Back Cal·lovosaure Catalan Callovosaurus Czech Callovosaurus German Callovosaurus leedsi Spanish کالووسور FA Callovosaurus French קלווזאורוס HE Callovosaurus leedsi Italian Callovosaurus Dutch Kelowozaur Polish
| Callovosaurus Temporal range: Callovian
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| Illustration of the holotype femur | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | †Ornithischia |
| Clade: | †Neornithischia |
| Clade: | †Ornithopoda |
| Family: | †Dryosauridae |
| Genus: | †Callovosaurus Galton, 1980 |
| Species: | †C. leedsi
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| Binomial name | |
| †Callovosaurus leedsi Galton, 1980 (Lydekker, 1889)
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| Synonyms | |
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Callovosaurus (meaning "Callovian lizard") is a genus of iguanodontian dinosaur known from most of a left thigh bone discovered in Middle Jurassic-age rocks of England. At times, it has been considered dubious or a valid genus of basal iguanodontian, perhaps a dryosaurid.