| Named By: | F. Nopcsa in 1923 |
| Time Period: | 100 Ma Late Cretaceous |
| Location: | Slovenia |
| Size: | Unavailable |
| Diet: | Piscivore/Carnivore |
| Fossil(s): | Partial remains |
| Classification: | | Chordata | Reptilia | Squamata | Mosasauroidea | |
Eidolosaurus was a genus of mosasauroid from the Late Cretaceous period of Slovenia.