| Named By: | P. CruzadoinCaballero, X. PeredainSuberbiola & J. I. RuizinOmenaca in 2010 |
| Time Period: | Late Cretaceous, 66 Ma |
| Location: | Spain - Aren Formation |
| Size: | Uncertain due to lack of fossil remains |
| Diet: | Herbivore |
| Fossil(s): | Partial skull and lower jaws |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Ornithopoda | Hadrosauridae | Lambeosaurinae | |
Blasisaurus is a genus of lambeosaurine hadrosaurid dinosaur from the Late Cretaceous. It is known from a partial skull and skeleton found in late Maastrichtian-age rocks of Spain. The type species is Blasisaurus canudoi, described in 2010 by Penelope Cruzado-Caballero, Xabier Pereda-Suberbiola and Jose Ignacio Ruiz-Omenaca, a group of researchers from Spain.