California
Snakes in Marin County
13 species have been documented here, 2 of them venomous.
Venomous snakes in Marin 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 Marin County
Gopher Snake
Pituophis catenifer
Harmless
Western Terrestrial Garter Snake
Thamnophis elegans
Harmless
Aquatic Garter Snake
Thamnophis atratus
Harmless
Western Rattlesnake
Crotalus oreganus
Venomous
Ring-necked Snake
Diadophis punctatus
Harmless
Common Sharp-tailed Snake
Contia tenuis
Harmless
California King Snake
Lampropeltis californiae
Harmless
North American Racer
Coluber constrictor
Harmless
Common Garter Snake
Thamnophis sirtalis
Harmless
Northern Rubber Boa
Charina bottae
Harmless
Eastern Kingsnake
Lampropeltis getula
Harmless
Prairie Rattlesnake
Crotalus viridis
Venomous
Sierra Garter Snake
Thamnophis couchii
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Marin County: FAQ
- Are there venomous snakes in Marin County, California?
- Yes. 2 venomous snake species have verified records in Marin County, California, including Western Rattlesnake, Prairie Rattlesnake. Most snakes in Marin County, California, however, are harmless.
- How many snake species live in Marin County, California?
- 10+ snake species have verified records in Marin County, California, of which 2 are venomous.
- What is the most commonly seen snake in Marin County, California?
- The Gopher Snake is the most frequently reported snake in Marin County, California, based on verified wildlife observations.
- What should I do if I see a venomous snake in Marin County, California?
- 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.