Oklahoma's diverse terrain makes it home to a number of wild animals like coyotes, lizards, snakes, black bears, turtles, etc. This Buzzle article gives a complete list of snake species found in Oklahoma.
List of Nonvenomous Snakes in Oklahoma
Broad-banded Watersnake
Nerodia fasciata confluensBlack Ratsnake
Pantherophis obsoletus
Brownsnake
Storeria dekayi texanaBullsnake
Pituophis catenifer sayi
Coachwhip
Masticophis flagellumGartersnake
Thamnophis sirtalis
Checkered garter snake
Thamnophis marcianusDiamond-backed Watersnake
Nerodia rhombifer rhombifer
Eastern Hog-nosed Snake
Heterodon platirhinosFlat-headed Snake
Tantilla gracilis
Graham's Crayfish Snake
Regina grahamiGreat Plains Ratsnake
Elaphe emoryi
Groundsnake
Sonora semiannulataBullsnake
Pituophis catenifer sayi
Kansas Glossy
Arizona elegans elegansLined Snake
Tropidoclonion lineatum
Marcy's Checkered Gartersnake
Thamnophis marcianus marcianusMilksnake
Lampropeltis triangulum
New Mexico Threadsnake
Leptotyphlops dissectusNorthern Red-bellied Snake
Storeria occipitomaculata occipitomaculata
Northern Rough Greensnake
Opheodrys aestivusNorthern Scarletsnake
Cemophora coccinea copei
Northern Watersnake
Nerodia sipedonOrange-striped Ribbonsnake
Thamnophis proximus proximus
Plain-bellied Watersnake
Nerodia erythrogasterPlains Black-headed Snake
Tantilla nigriceps
Plains Gartersnake
Thamnophis radixPrairie Kingsnake
Lampropeltis calligaster
Ring-necked Snake
Diadophis punctatus
Rough Earthsnake
Virginia striatulaSpeckled Kingsnake
Lampropeltis getula holbrooki
Texas Long-nosed Snake
Rhinocheilus lecontei tessellatusTexas Nightsnake
Hypsiglena torquata jani
Texas blind snake
Leptotyphlops dulcisWestern Black-necked Gartersnake
Thamnophis cyrtopsis cyrtopsis
Western Hog-nosed Snake
Heterodon nasicusWestern Mudsnake
Farancia abacura reinwardtii
Western Smooth Earthsnake
Virginia valeriae elegansWestern Wormsnake
Carphophis vermis
Western terrestrial garter snake
Thamnophis elegans
List of Venomous Snakes in Oklahoma
Copperhead
Agkistrodon contortrixPrairie Rattlesnake
Crotalus viridis
Timber Rattlesnake
Crotalus horridusWestern Cottonmouth
Agkistrodon piscivorous leucostoma
Western Diamond-backed Rattlesnake
Crotalus atroxWestern 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.