Texas
Snakes in Galveston County
22 species have been documented here, 4 of them venomous.
Venomous snakes in Galveston County
Full guide & what to do if bitten →
Northern CottonmouthAgkistrodon piscivorusVenomousHeavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.
Western Diamond-backed RattlesnakeCrotalus atroxVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Texas CoralsnakeMicrurus tenerVenomousRings of red, yellow, and black where red touches yellow; small rounded head and round pupils.
Eastern CopperheadAgkistrodon contortrixVenomousHeavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.
Every snake recorded in Galveston County
Western Ribbon Snake
Thamnophis proximus
Harmless
Northern Cottonmouth
Agkistrodon piscivorus
Venomous
Saltmarsh Snake
Nerodia clarkii
Harmless
Western Ratsnake
Pantherophis obsoletus
Harmless
Mississippi Green Watersnake
Nerodia cyclopion
Harmless
Common Coachwhip
Masticophis flagellum
Harmless
Plain-bellied Watersnake
Nerodia erythrogaster
Harmless
Rough Earthsnake
Virginia striatula
Harmless
Western Diamond-backed Rattlesnake
Crotalus atrox
Venomous
Diamondback Watersnake
Nerodia rhombifer
Harmless
Speckled Kingsnake
Lampropeltis holbrooki
Harmless
Banded Watersnake
Nerodia fasciata
Harmless
DeKay's Brownsnake
Storeria dekayi
Harmless
Rough Greensnake
Opheodrys aestivus
Harmless
Texas Coralsnake
Micrurus tener
Venomous
Eastern Copperhead
Agkistrodon contortrix
Venomous
North American Racer
Coluber constrictor
Harmless
Graham's Crawfish Snake
Regina grahamii
Harmless
Brahminy Blindsnake
Indotyphlops braminus
Harmless
Eastern Kingsnake
Lampropeltis getula
Harmless
Prairie Kingsnake
Lampropeltis calligaster
Harmless
Common Watersnake
Nerodia sipedon
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Galveston County: FAQ
- Are there venomous snakes in Galveston County, Texas?
- Yes. 4 venomous snake species have verified records in Galveston County, Texas, including Northern Cottonmouth, Western Diamond-backed Rattlesnake, Texas Coralsnake, Eastern Copperhead. Most snakes in Galveston County, Texas, however, are harmless.
- How many snake species live in Galveston County, Texas?
- 20+ snake species have verified records in Galveston County, Texas, of which 4 are venomous.
- What is the most commonly seen snake in Galveston County, Texas?
- The Western Ribbon Snake is the most frequently reported snake in Galveston County, Texas, based on verified wildlife observations.
- What should I do if I see a venomous snake in Galveston County, Texas?
- 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.