| Named By: | M. F. Ivakhnenko in 2008 |
| Time Period: | 260.5-251.0 Ma |
| Location: | Russia |
| Size: | Skull estimated to be about 40 to 50 centimetres long |
| Diet: | Carnivore |
| Fossil(s): | Maxilla |
| Classification: | | Chordata | Synapsida | Therapsida | Therocephalia | Whaitsiidae | |
Megawhaitsia is an extinct genus of large therapsid, potentially a therocephalian. It lived in the Late Permian in East Russia, and is known only by a maxilla, with a skull estimated to be 40-50 cm.