Illinois
Snakes in Jefferson County
7 species have been documented here, and none are venomous.
Every snake recorded in Jefferson County
Common Watersnake
Nerodia sipedon
Harmless
North American Racer
Coluber constrictor
Harmless
Prairie Kingsnake
Lampropeltis calligaster
Harmless
Common Garter Snake
Thamnophis sirtalis
Harmless
Gray Ratsnake
Pantherophis spiloides
Harmless
Plain-bellied Watersnake
Nerodia erythrogaster
Harmless
Eastern Milksnake
Lampropeltis triangulum
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Jefferson County: FAQ
- Are there venomous snakes in Jefferson County, Illinois?
- No venomous snakes have verified records in Jefferson County, Illinois. Every snake recorded here is harmless to humans, though any snake may bite defensively if handled.
- How many snake species live in Jefferson County, Illinois?
- 7 snake species have verified records in Jefferson County, Illinois.
- What is the most commonly seen snake in Jefferson County, Illinois?
- The Common Watersnake is the most frequently reported snake in Jefferson County, Illinois, based on verified wildlife observations.