FG-0041 · Wildlife · 6 species
Identifying Snakes in Ohio
By Derek Gauger · Updated
Overview
Ohio has around 25 snake species across its farmland, forests, and wetlands, and only three are venomous — all uncommon and localized. The overwhelming majority are harmless and beneficial.
Identify from a distance — a photo from several feet away is all you need. This guide covers the snakes you are most likely to encounter in Ohio.
Key species to know
FG-0041.01
Black Rat Snake
Pantherophis alleghaniensis
A large, mostly black non-venomous constrictor, Ohio's longest snake, and a strong climber often found around barns and old buildings. Harmless and a valuable rodent-hunter.
Habitat: Woodlands, farmland, and suburbs statewide.
FG-0041.02
Common Garter Snake
Thamnophis sirtalis
A slender, harmless snake with three pale stripes down a dark body — Ohio's most common and widespread snake. Gentle and quick to flee.
Habitat: Gardens, meadows, and damp areas near water.
FG-0041.03
Northern Water Snake
Nerodia sipedon
A non-venomous water snake with dark bands, frequently mistaken for a cottonmouth (which does not live in Ohio) and needlessly killed. Harmless but will bite if grabbed.
Habitat: Ponds, rivers, lakes, and Lake Erie shorelines.
FG-0041.04
Eastern Milk Snake
Lampropeltis triangulum
A gray-to-tan non-venomous snake with reddish-brown, dark-edged blotches, sometimes mistaken for a copperhead but slimmer and glossier. Harmless and often found near barns.
Habitat: Fields, woodland edges, and around buildings.
FG-0041.05
Northern Copperhead
Agkistrodon contortrix
A pit viper with hourglass-shaped chestnut bands over a tan body, camouflaged in leaf litter. Ohio's most widespread venomous snake, mostly in the unglaciated southeast; generally mild.
Habitat: Rocky wooded hillsides in eastern and southern Ohio.
Venomous. Watch where you step and reach in leaf litter and rocky areas.
FG-0041.06
Eastern Massasauga
Sistrurus catenatus
A small, shy rattlesnake with dark saddle blotches and a slender rattle, found in scattered wet prairies and fens. Venomous but rare, secretive, and state-threatened.
Habitat: Wet prairies, fens, and bog edges in a few local areas.
Venomous. This is a rare, protected snake — keep well back, never handle it, and leave it undisturbed.
Through the seasons
- Snakes are most active spring through fall, and on warm summer evenings.
- Ohio has no cottonmouths — any banded snake near water is a harmless water snake.
- Most bites occur when people try to handle or kill a snake — give it room and it will leave.
Questions
- How many venomous snakes are in Ohio?
- Three, all uncommon: the northern copperhead (southeast), the timber rattlesnake (a few forested southern counties), and the eastern massasauga (scattered wet prairies). Bites are rare.
- Are there cottonmouths in Ohio?
- No. Cottonmouths do not live in Ohio — any banded snake you see near water is a harmless northern water snake. Photograph it from a distance and use an app like Spotter to confirm.
From Field Notes
Not sure what you found?
Take a photo with Spotter for the name, field marks, look-alikes and safety notes in seconds.
In this guide
- Species
- 6
- Region
- Ohio