| Named By: | Brown in 1981 |
| Time Period: | 150.8-145.5 Ma Late Jurassic, Tithonian |
| Location: | England, Dorset - Kimmeridge Clay |
| Size: | Uncertain due to incomplete fossil material |
| Diet: | unavailable |
| Fossil(s): | Skull and cervical (neck) vertebrae |
| Classification: | | Chordata | Reptilia | Sauropterygia | Plesiosauria | Plesiosauroidea | Cryptoclididae | |
Kimmerosaurus ("lizard from Kimmeridge") is an extinct genus of plesiosaur from the family Cryptoclididae, closely related to Tatenectes.