A Complete List of Snake Species Found in Oklahoma

Oklahoma's diverse terrain makes it home to a number of wild animals like coyotes, lizards, snakes, black bears, turtles, etc. This AnimalSake article gives a complete list of snake species found in Oklahoma.
AnimalSake Staff
Did You Know?
There are as many as 47 different species of snakes found in Oklahoma, out of which 7 are potentially dangerous to humans.
Though Oklahoma has a staggering number of snake species, not all of them are poisonous. All venomous species found in Oklahoma come from the viper family, meaning that these snakes have pits (depression) on either side of their head between their eyes and nostrils. These pits acts as heat sensors that help them to find the presence of a warm-blooded prey in the dark.
There are many ways to identify venomous snakes from non venomous ones. Venomous snakes can be classified into rattlesnake, copperhead and cottonmouth. They can be distinguished from their physical features, more precisely from their colors and patterns on the skin.
Rattlesnakes, which comprise a majority of venomous snakes of Oklahoma, are endowed with rattlers on their tail. They are known to vigorously vibrate their rattlers as a threat display or warning to passer-byes. Copperhead snakes usually have brown, peachy or tan mottled coloration that help them to blend in with the surroundings. Cottonmouth snake can be a little tricky to identify from its nonvenomous counterparts because of its dark coloration and relatively inconspicuous pattern.
However, the most definitive feature that separates a cottonmouth from others is the presence of a black mark that runs from its eyes to the corner of its mouth. The cottonmouth is typically known for opening its jaws wide open and revealing its white flesh (from which it derives its name). While the non venomous snakes found in Oklahoma are innocuous, they are still known to attack or bite, if provoked.
List of Nonvenomous Snakes in Oklahoma
Black Ratsnake
Black Ratsnake
Pantherophis obsoletus
Bull Snake
Pituophis catenifer sayi
Masticophis flagellum
Eastern Hog-nosed Snake
Eastern hog-nosed snake
Heterodon platirhinos
Lampropeltis triangulum
Northern Rough Greensnake
Northern Rough Greensnake
Opheodrys aestivus
Coluber constrictor
Broad-banded Watersnake
Nerodia fasciata confluens
Storeria dekayi texana
Thamnophis sirtalis
Checkered garter snake
Thamnophis marcianus
Diamond-backed Watersnake
Nerodia rhombifer rhombifer
Flat-headed Snake
Tantilla gracilis
Graham's Crayfish Snake
Regina grahami
Great Plains Ratsnake
Elaphe emoryi
Sonora semiannulata
Kansas Glossy
Arizona elegans elegans
Lined Snake
Tropidoclonion lineatum
Marcy's Checkered Gartersnake
Thamnophis marcianus marcianus
New Mexico Threadsnake
Leptotyphlops dissectus
Northern Red-bellied Snake
Storeria occipitomaculata occipitomaculata
Northern Scarletsnake
Cemophora coccinea copei
Northern Watersnake
Nerodia sipedon
Orange-striped Ribbonsnake
Thamnophis proximus proximus
Plain-bellied Watersnake
Nerodia erythrogaster
Plains Black-headed Snake
Tantilla nigriceps
Plains Gartersnake
Thamnophis radix
Prairie Kingsnake
Lampropeltis calligaster
Ring-necked Snake
Diadophis punctatus
Rough Earthsnake
Virginia striatula
Speckled Kingsnake
Lampropeltis getula holbrooki
Texas Long-nosed Snake
Rhinocheilus lecontei tessellatus
Texas Nightsnake
Hypsiglena torquata jani
Texas blind snake
Leptotyphlops dulcis
Western Black-necked Gartersnake
Thamnophis cyrtopsis cyrtopsis
Western Hog-nosed Snake
Heterodon nasicus
Western Mudsnake
Farancia abacura reinwardtii
Western Smooth Earthsnake
Virginia valeriae elegans
Western Wormsnake
Carphophis vermis
Western terrestrial garter snake
Thamnophis elegans
List of Venomous Snakes in Oklahoma
Venomous Copperhead
Agkistrodon contortrix
Prairie Rattlesnake
Prairie Rattlesnake
Crotalus viridis
Western Diamond-backed Rattlesnake
Western Diamondback Rattlesnake
Crotalus atrox
Timber Rattlesnake
Crotalus horridus
Western Cottonmouth
Agkistrodon piscivorous leucostoma
Western Massasauga Rattlesnake
Sistrurus catenatus tergeminus
Western Pygmy Rattlesnake
Sistrurus miliarius streckeri
Even if you can identify a non venomous, it is still important to get immediate medical treatment after a snakebite or attack. Always remember, a snake will never attack a human unless stepped on, or feels alarmed or threatened. Hence, the wise thing is to keep away from them and not put yourself in any danger by trying to handle it. Snakes are as much afraid of us as we are of them, so the feeling is pretty mutual; don't bother them, and they will slink away indifferently.