Kansas
Snakes in Thomas County
4 species have been documented here, 1 of them venomous.
Venomous snakes in Thomas County
Full guide & what to do if bitten →
Prairie RattlesnakeCrotalus viridisVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Every snake recorded in Thomas County

Gopher Snake
Pituophis catenifer
Harmless

Prairie Rattlesnake
Crotalus viridis
Venomous

North American Racer
Coluber constrictor
Harmless

Plains Garter Snake
Thamnophis radix
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Thomas County: FAQ
- Are there venomous snakes in Thomas County, Kansas?
- Yes. 1 venomous snake species has verified records in Thomas County, Kansas, including Prairie Rattlesnake. Most snakes in Thomas County, Kansas, however, are harmless.
- How many snake species live in Thomas County, Kansas?
- 4 snake species have verified records in Thomas County, Kansas, of which 1 is venomous.
- What is the most commonly seen snake in Thomas County, Kansas?
- The Gopher Snake is the most frequently reported snake in Thomas County, Kansas, based on verified wildlife observations.
- What should I do if I see a venomous snake in Thomas County, Kansas?
- 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.