Wyoming
Snakes in Sweetwater County
4 species have been documented here, 2 of them venomous.
Venomous snakes in Sweetwater County
Full guide & what to do if bitten →
Western RattlesnakeCrotalus oreganusVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Prairie RattlesnakeCrotalus viridisVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Every snake recorded in Sweetwater County

Western Rattlesnake
Crotalus oreganus
Venomous

Prairie Rattlesnake
Crotalus viridis
Venomous

Western Terrestrial Garter Snake
Thamnophis elegans
Harmless

Gopher Snake
Pituophis catenifer
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Sweetwater County: FAQ
- Are there venomous snakes in Sweetwater County, Wyoming?
- Yes. 2 venomous snake species have verified records in Sweetwater County, Wyoming, including Western Rattlesnake, Prairie Rattlesnake. Most snakes in Sweetwater County, Wyoming, however, are harmless.
- How many snake species live in Sweetwater County, Wyoming?
- 4 snake species have verified records in Sweetwater County, Wyoming, of which 2 are venomous.
- What is the most commonly seen snake in Sweetwater County, Wyoming?
- The Western Rattlesnake is the most frequently reported snake in Sweetwater County, Wyoming, based on verified wildlife observations.
- What should I do if I see a venomous snake in Sweetwater County, Wyoming?
- 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.