• Black-Tailed Rattlesnake (Crotalus molossus) * ++ (Wiki link)
• Broad-Banded Copperhead (Agkistrodon contortrix laticinctus) * (link)
• Banded Water Snake (Nerodia fasciata confluens) ++ (Wiki link)
  
• Bullsnake (Pituophis catenifer sayi) (link) 

• Central Texas Whipsnake (Masticophis taeniatus girardi) (link)
• Checkered Garter Snake (Thamnophis marcianus) (link)

• Diamondback Water Snake (Nerodia rhombifer) (link)

• Eastern Blackneck Garter Snake (Thamnophis cyrtopsis ocellatus) (link)
• Eastern Hognose Snake (Heterodon platirhinos) (link)
• Eastern Yellow-bellied Racer (Coluber constrictor flaviventris) (link)

• Flathead Snake (Tantilla gracilis) (Wiki link)

• Glossy Snake (Arizona elegans) ++ (Wiki link)
• Great Plains Rat Snake (Pantherophis emoryi) (link)
• Ground Snake (Sonora semiannulata) (Wiki link)

• Intergraded Kingsnake (Lampropeltis getula splendida/holbrooki) (link)

• Long-nose Snake (Rhinocheilus lecontei) ++ (Wiki link)
• Louisiana Milk Snake (Lampropeltis triangulum amaura) ++ (Wiki link)

• Plain-bellied water snake (Nerodia erythrogaster) (link)
• Plains Black-headed Snake (Tantilla nigriceps) (Wiki link)
• Prairie Kingsnake (Lampropeltis calligaster) (link)
• Prairie Ringneck Snake (Diadophis punctatus arnyi) ++ (Wiki link)

• Redstripe Ribbon Snake (Thamnophis proximus rubrilineatus) (link)
• Rough Earth Snake (Haldea striatula) (link)
• Rough Green Snake (Opheodrys aestivus) (link)

• Texas Blind Snake (Rena dulcis) (link)
• Texas Brown Snake (Storeria dekayi texana) (link)
• Texas Coral Snake (Micrurus tener) * (link)
• Texas Garter Snake (Thamnophis sirtalis annectens) ++ (Wiki link)
• Texas Lined Snake (Tropidoclonion lineatum) (link)
• Texas Patchnose Snake (Salvadora grahamiae lineata) (link)
• Texas Rat Snake (Elaphe obsoleta lindheimeri) (link)

• Western Coachwhip (Masticophis flagellum testaceus) (link)
• Western Cottonmouth (Agkistrodon piscivorus) * (link)
• Western Diamondback Rattlesnake (Crotalus atrox) * (link)
• Western Ground Snake (Sonora semiannulata) (Wiki link)
• Western Ribbon Snake (Thamnophis proximus) ++ (Wiki link)

‡   Red * denotes a venomous species
‡   Green denotes non-venomous species
‡   ++ Blue denotes a species that has not had a recorded sighting in this county in many years