| Named By: | Zulma Gasparini in 2009 |
| Time Period: | Oxfordian |
| Location: | Cuba, Pinar del Rio - Jagua Formation |
| Size: | Uncertain |
| Diet: | Piscivore/Carnivore |
| Fossil(s): | Partial skull and mandible (lower jaw) and some cervical (neck) vertebrae. Holotype remains are possibly those of a juvenile |
| Classification: | | Chordata | Reptilia | Sauropterygia | Plesiosauria | Pliosauridae | |
Gallardosaurus is a genus of pliosaurid plesiosaur from the Caribbean seaway. It contains the single species Gallardosaurus iturraldei. Gallardosaurus was found in middle-late Oxfordian-age (Late Jurassic) rocks of the Jagua Formation of western Cuba. Gallardosaurus is believed to be evolutionarily connected to Peloneustes, a pliosaurid commonly found in the Oxfordian-aged sediment.