| Named By: | Alfred S. Romer in 1937 |
| Time Period: | Early Permian, 295 Ma |
| Location: | USA, New Mexico - Abo Cutler Formation |
| Size: | From about 75 to 100 centimetres long |
| Diet: | Uncertain |
| Fossil(s): | Two individuals |
| Classification: | | Chordata | Synapsida | Eupelycosauria | Varanopidae | Varanodontinae | |
Aerosaurus (meaning "copper lizard") is an extinct genus within Varanopidae, a family of non-mammalian synapsids. It lived during the Early Permian in North America. The name comes from Latin aes (aeris) (combining stem: aer-) "copper" and Greek sauros "lizard," for El Cobre Canyon (from Spanish cobre "copper") in northern New Mexico, where the type fossil was found and the site of former copper mines.