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
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.
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.
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.
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.
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.
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.
Seasonal Guide
- 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.
Safety Reminder
Identify snakes from a safe distance only, and never handle one to get a photo. If someone is bitten, treat it as a medical emergency and contact emergency services immediately — do not wait to identify the snake or attempt folk remedies. App results are reference information, not medical advice.
Identify it instantly
Found something and not sure what it is? Point your camera with Spotter and get a species identification in seconds — with detailed reference info and species notes.