| Genus | Species | Common Name | Synonyms |
| Testudinidae Land Tortoise Family | |||
| Gopherus | agassizi | Desert tortoise | Xerobates a. |
| Anguidae Alligator Lizard Family | |||
| Elgaria | multicarinatus | Southern alligator lizard | |
| Anniellidae North American Legless Lizards | |||
| Anniella | pulchra | California legless lizard | |
| Crotaphytidae Collared and Leopard Lizard Family | |||
| Crotaphytus | vestigium | Baja black-collared lizard | C. collaris, C. insularis |
| Gambelia | wislizenii | Long-nosed leopard lizard | Crotaphytus w. Leopard lizard |
| Gekkonidae Gecko Family | |||
| Coleonyx | variegatus | Banded gecko | |
| Phyllodactylus | xanti | Leaf-toed gecko | P. nocticolus |
| Iguanidae | |||
| Dipsosaurus | dorsalis | Desert iguana | |
| Sauromalus | obesus | Chuckwalla | S. ater Common chuckwalla |
| Phrynosomatidae Horned Lizard Family | |||
| Callisaurus | draconoides | Zebra-tailed lizard | |
| Petrosaurus | mearnsi | Banded rock lizard | Streptosaurus m. |
| Phrynosoma | coronatum | Coast horned lizard | |
| Phrynosoma | mcallii | Flat-tailed horned lizard | |
| Phrynosoma | platyrhinos | Desert horned lizard | |
| Sceloporus | graciosus | Sagebrush lizard | |
| Sceloporus | magister | Desert spiny lizard | |
| Sceloporus | occidentalis | Western fence lizard | |
| Sceloporus | orcutti | Granite spiny lizard | |
| Uma | inornata | Coachella Valley fringe-toed lizard | |
| Urosaurus | graciosus | Long-tailed brush lizard | |
| Uta | stansburiana | Side-blotched lizard | |
| Scincidae Skink Family | |||
| Eumeces | skiltonianus | Western skink | Plestiodon s. |
| Eumeces | gilberti | Gilbert’s skink | Plestiodon g. |
| Teiidae Whiptail and Racerunner Family | |||
| Cnemidophorus t. | tigris | Western whiptail | Aspidoscelis t. |
| Xantusidae Night Lizard Family | |||
| Xantusia | henshawi | Granite night lizard | |
| Xantusia | vigilis | Desert night lizard | Yucca night lizard |
| Boidae Boa and Python Family | |||
| Lichanura | trivirgata | Rosy boa | Charina t. |
| Colubridae Colubrid Snake Family | |||
| Arizona | elegans | Western glossy snake | A. occidentalis |
| Chionactis | occipitalis | Western shovel-nosed snake | |
| Diadophis | punctatus | Ring-necked snake | |
| Hypsiglena | torquata | Night snake | Spotted night snake |
| Lampropeltis | getula | Common kingsnake | L. getulus |
| Masticophis | flagellum | Coachwhip | Red racer |
| Masticophis | lateralis | Striped racer | |
| Phyllorhynchus | decurtatus | Leaf-nosed snake | |
| Pituophis | catenifer | Gopher snake | P. melanoleucus |
| Rhinocheilus | lecontei | Western long-nosed snake | |
| Salvadora | hexalepis | Western patch-nosed snake | |
| Tantilla | planiceps | Western black-headed snake | |
| Trimorphodon | biscutatus | Lyre snake | |
| Leptotyphlopidae Blind Snake Family | |||
| Leptotyphlops | humilus | ||
| Viperidae Viper Family | |||
| Crotalus | cerastes | Sidewinder | |
| Crotalus | ruber | Red diamond rattlesnake | |
| Crotalus | mitchelli | Speckled rattlesnake | |
| Crotalus | viridis | Western rattlesnake | C. oreganus |