Washington
Snakes in Franklin County
5 species have been documented here, 2 of them venomous.
Venomous snakes in Franklin 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 Franklin County

Gopher Snake
Pituophis catenifer
Harmless

Western Rattlesnake
Crotalus oreganus
Venomous

Prairie Rattlesnake
Crotalus viridis
Venomous

North American Racer
Coluber constrictor
Harmless

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