Idaho
Snakes in Oneida County
5 species have been documented here, 1 of them venomous.
Venomous snakes in Oneida 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.
Every snake recorded in Oneida County

Western Terrestrial Garter Snake
Thamnophis elegans
Harmless

Gopher Snake
Pituophis catenifer
Harmless

North American Racer
Coluber constrictor
Harmless

Northern Rubber Boa
Charina bottae
Harmless

Western Rattlesnake
Crotalus oreganus
Venomous
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Oneida County: FAQ
- Are there venomous snakes in Oneida County, Idaho?
- Yes. 1 venomous snake species has verified records in Oneida County, Idaho, including Western Rattlesnake. Most snakes in Oneida County, Idaho, however, are harmless.
- How many snake species live in Oneida County, Idaho?
- 5 snake species have verified records in Oneida County, Idaho, of which 1 is venomous.
- What is the most commonly seen snake in Oneida County, Idaho?
- The Western Terrestrial Garter Snake is the most frequently reported snake in Oneida County, Idaho, based on verified wildlife observations.
- What should I do if I see a venomous snake in Oneida County, Idaho?
- 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.