| Kelmayisaurus Temporal range: Early Cretaceous
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| Maxilla and dentary of IVPP V 4022, the holotype of K. petrolicus | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | Theropoda |
| Family: | †Carcharodontosauridae |
| Genus: | †Kelmayisaurus Dong, 1973 |
| Type species | |
| †Kelmayisaurus petrolicus Dong, 1973
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Kelmayisaurus (meaning "Karamay lizard") is an extinct genus of carcharodontosaurid theropod dinosaur from the Early Cretaceous. It was roughly 10–12 meters (33–39 feet) long and its name refers to the petroleum-producing city of Karamay in the Xinjiang province of western China near where it was found.