Oklahoma
Snakes in Johnston County
19 species have been documented here, 6 of them venomous.
Venomous snakes in Johnston County
Full guide & what to do if bitten →
Pygmy RattlesnakeSistrurus miliariusVenomousStout, dark-blotched body, nine large scales on the crown, and a small rattle.
Northern CottonmouthAgkistrodon piscivorusVenomousHeavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.
Eastern CopperheadAgkistrodon contortrixVenomousHeavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.
Broad-banded CopperheadAgkistrodon laticinctusVenomousHeavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.
Western Diamond-backed RattlesnakeCrotalus atroxVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Timber RattlesnakeCrotalus horridusVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Every snake recorded in Johnston County
Pygmy Rattlesnake
Sistrurus miliarius
Venomous
Common Garter Snake
Thamnophis sirtalis
Harmless
Northern Cottonmouth
Agkistrodon piscivorus
Venomous
Plain-bellied Watersnake
Nerodia erythrogaster
Harmless
Western Ratsnake
Pantherophis obsoletus
Harmless
DeKay's Brownsnake
Storeria dekayi
Harmless
Western Ribbon Snake
Thamnophis proximus
Harmless
Diamondback Watersnake
Nerodia rhombifer
Harmless
Flat-headed Snake
Tantilla gracilis
Harmless
Eastern Copperhead
Agkistrodon contortrix
Venomous
Rough Greensnake
Opheodrys aestivus
Harmless
North American Racer
Coluber constrictor
Harmless
Common Coachwhip
Masticophis flagellum
Harmless
Broad-banded Copperhead
Agkistrodon laticinctus
Venomous
Common Watersnake
Nerodia sipedon
Harmless
Prairie Kingsnake
Lampropeltis calligaster
Harmless
Western Diamond-backed Rattlesnake
Crotalus atrox
Venomous
Timber Rattlesnake
Crotalus horridus
Venomous
Speckled Kingsnake
Lampropeltis holbrooki
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Johnston County: FAQ
- Are there venomous snakes in Johnston County, Oklahoma?
- Yes. 6 venomous snake species have verified records in Johnston County, Oklahoma, including Pygmy Rattlesnake, Northern Cottonmouth, Eastern Copperhead, Broad-banded Copperhead. Most snakes in Johnston County, Oklahoma, however, are harmless.
- How many snake species live in Johnston County, Oklahoma?
- 10+ snake species have verified records in Johnston County, Oklahoma, of which 6 are venomous.
- What is the most commonly seen snake in Johnston County, Oklahoma?
- The Pygmy Rattlesnake is the most frequently reported snake in Johnston County, Oklahoma, based on verified wildlife observations.
- What should I do if I see a venomous snake in Johnston County, Oklahoma?
- Keep your distance and do not try to catch or kill it. Most bites happen when people handle or corner a snake. If someone is bitten, contact local emergency services or poison control immediately.