Illinois
Snakes in Randolph County
17 species have been documented here, 1 of them venomous.
Venomous snakes in Randolph County
Full guide & what to do if bitten →
Eastern CopperheadAgkistrodon contortrixVenomousHeavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.
Every snake recorded in Randolph County
Common Wormsnake
Carphophis amoenus
Harmless
Gray Ratsnake
Pantherophis spiloides
Harmless
Common Garter Snake
Thamnophis sirtalis
Harmless
Common Watersnake
Nerodia sipedon
Harmless
Eastern Copperhead
Agkistrodon contortrix
Venomous
Plain-bellied Watersnake
Nerodia erythrogaster
Harmless
DeKay's Brownsnake
Storeria dekayi
Harmless
North American Racer
Coluber constrictor
Harmless
Ring-necked Snake
Diadophis punctatus
Harmless
Eastern Milksnake
Lampropeltis triangulum
Harmless
Western Ribbon Snake
Thamnophis proximus
Harmless
Western Ratsnake
Pantherophis obsoletus
Harmless
Red-bellied Snake
Storeria occipitomaculata
Harmless
Rough Greensnake
Opheodrys aestivus
Harmless
Diamondback Watersnake
Nerodia rhombifer
Harmless
Prairie Kingsnake
Lampropeltis calligaster
Harmless
Flat-headed Snake
Tantilla gracilis
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Randolph County: FAQ
- Are there venomous snakes in Randolph County, Illinois?
- Yes. 1 venomous snake species has verified records in Randolph County, Illinois, including Eastern Copperhead. Most snakes in Randolph County, Illinois, however, are harmless.
- How many snake species live in Randolph County, Illinois?
- 10+ snake species have verified records in Randolph County, Illinois, of which 1 is venomous.
- What is the most commonly seen snake in Randolph County, Illinois?
- The Common Wormsnake is the most frequently reported snake in Randolph County, Illinois, based on verified wildlife observations.
- What should I do if I see a venomous snake in Randolph County, Illinois?
- 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.