Are There Cottonmouths in Arkansas?
Yes, cottonmouths are established in Arkansas, primarily in the eastern and southeastern parts of the state, especially along the Mississippi River valley and swamplands. While they are present in suitable habitats, actual bites are uncommon. Most people can enjoy Arkansas's outdoors without encountering one if they stay alert and practice basic water safety.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 22, 2026.
Northern Cottonmouth · kirk gardner CC BY
Northern Cottonmouth · Mila Turov CC BY
Northern Cottonmouth · Joshua Liverman CC BY
- 1
- species recorded
- 1,352
- GBIF records
- May, April, June
- peak months
Yes, cottonmouths are in Arkansas. Next you'll want:
Real sighting data, source iNaturalist
1,339 verified observations on iNaturalist of cottonmouth have been recorded in Arkansas, most often in May, April, June.
When cottonmouth are recorded in Arkansas
Yes, cottonmouths are established in Arkansas, primarily in the eastern and southeastern parts of the state, especially along the Mississippi River valley and swamplands. While they are present in suitable habitats, actual bites are uncommon. Most people can enjoy Arkansas's outdoors without encountering one if they stay alert and practice basic water safety.
Are they in Arkansas?
Cottonmouths are well established throughout eastern and southeastern Arkansas, particularly in the Mississippi River valley, the swamps and bayous of the bottomlands, and wetland areas in the eastern counties. They are found in suitable habitats from Crittenden County south through Phillips, Monroe, Lee, and the southeastern portion of the state. You can learn more aboutCottonmouth in Arkansasand their specific distribution in your region. They are less common or absent in the western and northern parts of Arkansas, especially in the Ozark plateau and mountains where it is cooler and wetter habitats are less common. However, they can still be found in suitable river bottoms and wetland areas throughout the state's eastern half. The species is indeed present and established in Arkansas, but they are not aggressive and strongly prefer to avoid humans. Most Arkansas residents can spend years outdoors without ever seeing one.
How dangerous is it?
A cottonmouth bite is medically significant and should always be evaluated by a healthcare provider. The venom can cause pain, swelling, and tissue damage at the bite site, and in rare cases, systemic effects. However, deaths from cottonmouth bites in Arkansas are extremely rare, and modern medical care is highly effective at treating them. Most bites occur when someone tries to handle or kill the snake rather than leaving it alone. If bitten, the most important action is to get professional medical care promptly. The actual risk to the average person enjoying Arkansas's outdoors is very low because cottonmouths are not aggressive and will try to leave rather than strike. Fear of these snakes is natural but often exceeds the actual danger they pose.
How to recognize one
Cottonmouths are medium-sized venomous snakes, typically 24 to 36 inches long, with a thick, heavy body. Young snakes are brightly patterned with crossbands, while adults tend to be darker, ranging from dark brown to almost black, sometimes with faint banding visible. They have a distinctly triangular head and a stout, muscular body that is noticeably thicker than other water snakes. The name comes from their threat display: when cornered, they gape their mouth wide open, showing the distinctive white interior. They may also curl into a tight S-shape with their neck in preparation to strike. You can learn more about recognizing local wildlife by visitingArkansas wildliferesources. They hide in swamps, marshes, along pond edges, in hollow logs, under debris, and in cypress knees. Look for them in or near water during warm months.
What to do if you are bitten or stung
If bitten by a cottonmouth, stay calm and seek medical care immediately. Remove any rings or tight clothing from the bitten area and keep the limb still and below heart level if possible. Do not attempt to capture or kill the snake, as this risks another bite. Do not apply ice, tourniquets, or try field treatments like cutting or suction. Do not try to identify the snake type yourself before seeking care. This is general information, not medical advice; if you are bitten, call Poison Control at 1-800-222-1222, or 911 if symptoms are severe. Getting professional medical attention is the only effective treatment. Medical professionals can provide antivenom if needed and manage pain and complications. Contact a hospital or emergency room immediately and call ahead to alert them of a possible snake bite.
How to prevent encounters
Keep your yard clear of debris, woodpiles, and dense vegetation, especially near water or swampy areas. Wear closed-toe shoes and long pants when hiking or working outdoors near wetlands, rivers, or lakes. Shake out shoes and clothing before putting them on. Be cautious when reaching into tall grass, logs, or brush, especially near water. When fishing, boating, or exploring Arkansas's rivers, swamps, and bayous, stay on established areas and watch where you step. Never swim in murky water where you cannot see the bottom clearly. If you have property near a swamp, river, or wetland, keep grass cut short and remove shelter like stacked wood or rock piles. Seal gaps around doors, windows, and foundation cracks in your home. When camping in bottomland areas, keep food secured and camp away from water if possible.
Where in Arkansas and when
Cottonmouths in Arkansas are active during warm months, typically from April through October, with peak activity in late spring and summer. They are found primarily in eastern Arkansas, including the Mississippi River valley, the Cache River bottomlands, the White River swamps, and the bayou regions of the southeastern counties. Specific areas include Crittenden, St. Francis, Lee, Phillips, and Monroe counties, though they may occur in suitable habitat in other eastern counties. As you move west toward the Ozark region and north into the interior highlands, they become less common. In summer heat, they are most active at night or early morning. Winter is when they seek shelter in deep refuges and dens. Learn more aboutwildlife in Arkansasand their seasonal patterns. They are strictly dependent on water and humid conditions, so they are restricted to swamps, marshes, river bottoms, and wetland areas.
Harmless lookalikes
The snake you see in or near water in Arkansas is far more likely to be a harmless water snake than a cottonmouth. Northern water snakes are very common throughout eastern Arkansas and are frequently mistaken for cottonmouths because they also live near water and have somewhat similar coloring. Brown water snakes and green water snakes are also abundant harmless species in Arkansas wetlands. These water snakes are smaller-headed, have more elongated bodies, and are not venomous. Garter snakes and ribbon snakes are thin, harmless, and common around wetlands. The key difference is that cottonmouths have a thick, heavy body, a distinctly wide head, and that characteristic white mouth that opens in a threat display. When you see thesemore on Cottonmouth in Arkansasdetails, you will feel more confident identifying what you encounter. Most waterside snakes in Arkansas are harmless, which is excellent news.
Frequently Asked Questions
**Are cottonmouths dangerous in Arkansas?** Cottonmouth bites are serious and require medical care, but bites are uncommon and deaths are rare with proper treatment. **How common are cottonmouth bites in Arkansas?** Bites are quite uncommon because the snakes prefer to avoid humans. Most bites happen when someone tries to handle or kill a snake. **What attracts cottonmouths to a house?** Frogs, other snakes, insects, and standing water around your property. Remove these attractants by eliminating shelter and draining standing water. **What should I do if I see one?** Step back slowly and give the snake space to leave. Do not corner it or try to kill it. For more information, visit yourArkansas wildlife guideto learn about safety near water and in wetland areas. Most encounters can be avoided with basic caution and awareness.
Plan your trip
Best time to see cottonmouth in Arkansas: May, April, June
See the month-by-month sighting calendar.
Plan your cottonmouth sighting in Arkansas
1,352 verified cottonmouth records have been logged in Arkansas, most recently in 2026. See the GBIF records.
Where to look in Arkansas
- Arkansas Post National Memorial · Wildlife Watching, Birdwatching · Find hotels
- Buffalo National River · Wildlife Watching · Find hotels
- Hot Springs National Park · Wildlife Watching, Birdwatching · Find hotels
- Pea Ridge National Military Park · Wildlife Watching, Birdwatching · Find hotels
- Butterfield Overland National Historic Trail · Find hotels
- Fort Smith National Historic Site · Find hotels
Frequently asked questions
Are they in Arkansas?+
Cottonmouths are well established throughout eastern and southeastern Arkansas, particularly in the Mississippi River valley, the swamps and bayous of the bottomlands, and wetland areas in the eastern counties. They are found in suitable habitats from Crittenden County south through Phillips, Monroe, Lee, and the southeastern portion of the state. You can learn more aboutCottonmouth in Arkansasand their specific distribution in your region. They are less common or absent in the western and northern parts of Arkansas, especially in the Ozark plateau and mountains where it is cooler and wetter habitats are less common. However, they can still be found in suitable river bottoms and wetland areas throughout the state's eastern half. The species is indeed present and established in Arkansas, but they are not aggressive and strongly prefer to avoid humans. Most Arkansas residents can spend years outdoors without ever seeing one.
How dangerous is it?+
A cottonmouth bite is medically significant and should always be evaluated by a healthcare provider. The venom can cause pain, swelling, and tissue damage at the bite site, and in rare cases, systemic effects. However, deaths from cottonmouth bites in Arkansas are extremely rare, and modern medical care is highly effective at treating them. Most bites occur when someone tries to handle or kill the snake rather than leaving it alone. If bitten, the most important action is to get professional medical care promptly. The actual risk to the average person enjoying Arkansas's outdoors is very low because cottonmouths are not aggressive and will try to leave rather than strike. Fear of these snakes is natural but often exceeds the actual danger they pose.
More wildlife in Arkansas