| Named By: | Christian Erich Hermann von Meyer in 1830 |
| Time Period: | Lopingian, 260-251 Ma |
| Location: | England and Germany |
| Size: | Holotype estimated at 1.64 meters long, though fragmentary remains hint at a possible 2.5 meters long |
| Diet: | Uncertain, has been interpreted as a Herbivore and an Insectivore. See main text |
| Fossil(s): | Remains of many individuals, though often incomplete. Coprolites have been attributed to the genus as well |
| Classification: | | Chordata | Reptilia | Archosauromorpha | Protorosauria | Protorosauridae | |
Protorosaurus ("first lizard") is a genus of lizard-like early archosauromorph reptile. It lived during the late Permian period in Germany.