Illinois
Snakes in Dupage County
8 species have been documented here, and none are venomous.
Every snake recorded in Dupage County
Common Garter Snake
Thamnophis sirtalis
Harmless
DeKay's Brownsnake
Storeria dekayi
Harmless
Common Watersnake
Nerodia sipedon
Harmless
Plains Garter Snake
Thamnophis radix
Harmless
Eastern Foxsnake
Pantherophis vulpinus
Harmless
Queensnake
Regina septemvittata
Harmless
Eastern Milksnake
Lampropeltis triangulum
Harmless
Smooth Greensnake
Opheodrys vernalis
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Dupage County: FAQ
- Are there venomous snakes in Dupage County, Illinois?
- No venomous snakes have verified records in Dupage County, Illinois. Every snake recorded here is harmless to humans, though any snake may bite defensively if handled.
- How many snake species live in Dupage County, Illinois?
- 8 snake species have verified records in Dupage County, Illinois.
- What is the most commonly seen snake in Dupage County, Illinois?
- The Common Garter Snake is the most frequently reported snake in Dupage County, Illinois, based on verified wildlife observations.