Wisconsin
Snakes in Milwaukee County
5 species have been documented here, and none are venomous.
Every snake recorded in Milwaukee County

Butler's Garter Snake
Thamnophis butleri
Harmless

Common Garter Snake
Thamnophis sirtalis
Harmless

DeKay's Brownsnake
Storeria dekayi
Harmless

Eastern Milksnake
Lampropeltis triangulum
Harmless

Plains Garter Snake
Thamnophis radix
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Milwaukee County: FAQ
- Are there venomous snakes in Milwaukee County, Wisconsin?
- No venomous snakes have verified records in Milwaukee County, Wisconsin. Every snake recorded here is harmless to humans, though any snake may bite defensively if handled.
- How many snake species live in Milwaukee County, Wisconsin?
- 5 snake species have verified records in Milwaukee County, Wisconsin.
- What is the most commonly seen snake in Milwaukee County, Wisconsin?
- The Butler's Garter Snake is the most frequently reported snake in Milwaukee County, Wisconsin, based on verified wildlife observations.