Discover the 42 Snakes in Kansas (5 Are Venomous)

Written by Tracy Graham
Updated: October 13, 2023
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Key Points

  • Of the 42 species of snakes present in Kansas, most of them are nonvenomous.
  • There are 10 species that are threatened or in need of conservation, so these snakes can only be seen rarely in specific regions of the state.
  • The most common snakes in Kansas include the eastern racer, northern water snake, and plains milk snake.
  • The venomous species are the cottonmouth, copperhead, timber rattlesnake, prairie rattlesnake, and western massasauga.

If you live in Kansas you share your state with many different types of snakes. Kansas is home to more than 40 varieties of snakes. There are 42 different types of snakes that you could come across in Kansas, but only a small portion of them are venomous. Most of the snakes that you will see in Kansas won’t hurt you. If you’re an avid outdoor enthusiast and you like to hike, camp, hunt, or do other outdoor activities from March through about November you’ll likely come across some snakes during their months of peak activity. Let’s dive into snakes across The Free State!

The Most Common Snakes in Kansas

Even though Kansas has a lot of different types of snakes there are only a few that can be found in large numbers throughout the state. Ten types of snakes in Kansas are threatened or in need of added conservation, so you won’t usually come across those snakes unless you are in very specific parts of the state. The most common types of snakes in Kansas are:

Eastern Racer

Snakes in Kansas - Eastern Racer Snake

Eastern racers are one of the most common snakes found across Kansas

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©Matt Jeppson/

The eastern racer is one of the most commonly seen snakes in Kansas because it likes to inhabit the brush on the prairie as well as grass clumps and other obstructions. In suburban areas or farming areas these snakes are often found in trash piles, burn pits, and hay piles. The Eastern Racer is an extremely fast snake and usually if it feels threatened it will get out of the area as fast as it can. But if it feels cornered it may strike and bite.

Northern Water Snake

Snakes That Look Like Copperheads-Northern Water Snake

Northern water snakes are often confused with cottonmouth snakes. However, they’re not venomous.


The northern water snake is a snake that is frequently found in the many rivers, lakes, and streams that flow throughout Kansas. This snake is usually varying shade of gray and brown and may look like a water moccasin. Even though this type of snake is not venomous, it does bite when it feels threatened or provoked. So if you’re kayaking, fishing, or swimming and you see one of these snakes, give it a wide berth. It won’t kill you but it can give you a pretty painful bite.

Plains Milk Snake

common red milksnake curled up

There are 19-23 rows of scales on every milk snake.


The plains milk snake has a very striking appearance that looks scary, but this is a non-venomous snake. You can tell a plains milk snake by the distinctive bands of red, yellow, and black. It’s generally found in open prairies and in forests so if you are hiking keep your eyes open. It also is usually more active when the temperatures are warm in July and August.

5 Venomous Snakes in Kansas

Even though there are only five venomous snakes that are found throughout Kansas you should always be on the lookout for these snakes and be very wary if you see one. Remember that if you are bitten by a snake you need to get medical attention right away. Snake bites are rarely fatal but they can cause serious damage to your body.


Cottonmouth Snake

Cottonmouth snakes are semiaquatic.

©Jay Ondreicka/

Cottonmouth snakes are not commonly found anywhere in Kansas except in the southeastern part of the state.  These dull colored snakes may not look harmful but they are venomous so avoid them whenever possible. Reports of cottonmouth snakes in Kansas are rare, so its unlikely you’ll encounter one in the state.


What Does a Copperhead Snake Look Like

Coppherhead snakes are the most common venomous snake in Kansas.

©Breck P. Kent/

Copperhead snakes are the most common venomous snake in Kansas.  Every litter of Copperheads can contain up to 14 snakes, so from August to October be on the lookout for any baby copperheads when you’re working or playing outdoors! Some people have even been surprised to find litters of baby Copperheads in their mulch or near planters, so it’s best to stay on your guard when you’re doing any outdoor work during the fall. Copperheads are mostly found in the eastern half of Kansas.

Timber Rattlesnake

Iowa Snakes - Timber Rattlesnake

Timber rattlesnakes live mostly in eastern Kansas.

©Eric Isselee/

The timber rattlesnake is a shy snake and usually will hide or flee rather than attack. However, if the snake feels threatened or is cornered it will attack. The Timber Rattlesnake is the most deadly of the venomous snakes in Kansas so if you do see one you should leave it alone. The snake lives in the Eastern side of the snake, mostly in counties near the Missouri river.

Prairie Rattlesnake

Prairie rattlesnakes are the most common venomous rattlesnakes found in the western half of Kansas.

©Nina B/

The prairie rattlesnake is almost always found in the western half of the state so if you frequently are outdoors in the western part of Kansas look out for the prairie rattlesnake. The speckled brown reptile is known for a fondness of rocky areas, dry vegetation, and its habit of settling down in other creatures’ burrows.

Like other rattlesnakes the prairie rattler has rings around its tail that make a distinctive rattling sound when it’s agitated. However, the prairie rattlesnake is not usually aggressive. It prefers to flee rather than attack. If you are bitten by this snake you do need to get medical attention right away because it is very venomous.  

Western Massasauga

Iowa Snakes - Massasauga Rattlesnake

Massasaugas are common venomous snakes across the middle of the country


The western massasauga is the final venomous snake found in Kansas. Its name “massasauga”, is from the Ojibwe language and means “great river mouth”. These reptiles are smaller than other rattlesnakes found in the state, and can also be found throughout most of Kansas (they’re however rather rare in its western third region). The snake which is notable for its strikingly patterned scales seems to be rather fond of moisture and prefers to hang around wetlands.

Another Rattlesnake in Kansas

There is one more rattlesnake species present in Kansas — the Western Diamondback Rattlesnake, which inhabits dry desert regions, forests, rocky areas, and plains. However it’s seen extremely rarely, with possible sightings occurring in Barber and Comanche counties, perhaps near Kanopolis Reservoir.

These are the most aggressive of the rattlesnakes in the state and are biggest rattlesnake species in the southwestern desert, growing 4-7 feet long.

They have large, broad heads, with a dark line between their mouths and each eye. Their scales are strongly keeled and they feature dark, diamond patterns on their bodies, which are generally typically tan, pale blue-grey, grey, salmon, yellow-grey, olive, grey-brown, or cream-colored. These rattlesnakes have distinctive tails showing 2-8 black bands with cream, white, or pale grey markings. Read more about the types of rattlesnakes in Kansas here.

Western Diamondback Rattlesnake (Crotalus atrox)

Western diamondback rattlesnake is very rare in Kansas.

©Alexander Wong/

Being Safe Around Snakes

Most of the snakes that you’ll find in Kansas aren’t venomous. But, you should still be careful of harassing or angering a snake. Even the snakes that aren’t venomous can give you or your children a nasty bite.

The best thing you can do to protect yourself from a snake bite is to be aware of your surroundings. In most cases snakes won’t bother you unless you attack them or surprise them or if they feel cornered or threatened. You should know what snakes are active in your area and keep an eye out for them. When you are approaching tall clumps of prairie grass or disturbing rocks be careful because there may be snakes living or hiding in those areas. Always move slowly. And if you do see a snake, don’t attack it. Take a breath and back away slowly. If you turn and leave or back up and give the snake some space the chances are good the snake will just go away.

You should also know that in Kansas you need to have a permit to kill snakes. Getting a permit isn’t expensive, so if you live in an area that has a lot of open land or is known for having a lot of snakes you should get a permit so that you don’t end up getting fined if you do need to kill a snake.

When in prairie habitats, be cautious as there may be snakes such as prairie rattlesnakes present.

©Harris Motion Photo/

Non-Venomous Snakes in Kansas

Most of the snakes in Kansas are non-venomous. In addition to the non-venomous snakes already mentioned these non-venomous snakes can also be found throughout most of Kansas:

  • Eastern glossy snake
  • Western worm snake
  • Eastern racer
  • Ringneck snake
  • Western hognose snake
  • Eastern hognose snake
  • Night snake
  • Prairie kingsnake
  • Common kingsnake
  • Milk snake
  • New Mexico blind snake
  • Coachwhip
  • Plainbelly water snake
  • Diamondback water snake
  • Northern water snake
  • Rough green snake
  • Great Plains rat snake
  • Western rat snake
  • Gopher snake
  • Graham’s crayfish snake
  • Longnose snake
  • Ground snake
  • Brown snake
  • Redbelly snake species in need of conservation
  • Flathead snake
  • Plains blackhead snake
  • Checkered garter snake
  • Western ribbon snake
  • Plains garter snake
  • Common garter snake
  • Lined snake
  • Rough earth snake
  • Smooth earth snake

Kansas does have some of the most deadly snakes in the U.S. But, they are very rare and they are much more likely to run away than attack. You can peacefully share the great plains and rushing waters of Kansas with the many varieties of snakes that live in Kansas.

Bonus: What U.S. Rattlesnake Species Are the Most Dangerous?

Rattlesnakes are among the most deadly venomous snakes in the U.S., with 4 types being present in Kansas, as you learned. But their bites vary in toxicity, so it’s a good idea to be educated on what rattlesnakes are the most dangerous.

Mojave Green Rattlesnake

Some experts classify the Mojave green rattlesnake as the deadliest rattlesnake species in the United States.


Many experts classify the Mojave green rattlesnake, native to the Southwestern U.S. as well as Mexico, as the deadliest rattlesnake species on Earth. Its venom, which can be either hemotoxic or neurotoxic, can cause symptoms like vision impairment, difficulty swallowing and breathing, muscle weakness, severe body pain, convulsions, and death by cardiac arrest or respiratory failure if left untreated.

Eastern Diamondback Rattlesnake

eastern diamondback rattlesnake curled up in grass

The Eastern diamondback rattlesnake is responsible for the most deaths in the U.S. from snake bites.


This rattler is another contender for the deadliest rattlesnake in the United States. It’s also one of the largest snakes in the U.S., growing to a max length of 8.5 feet and max weight of 34 pounds. Its bite contains hemotoxic venom, capable of killing red blood cells and causing tissue damage. Another problem lies in the fact it can deliver 400-700 mg of venom in its bite, compared to 200-300 mg in the western diamondback rattlesnake, so its venom can lead to death. The Eastern diamondback rattlesnake is recognized as being responsible for the most deaths by snakebite in the U.S.

Western Diamondback Rattlesnake

Snake, Fang, Rattlesnake, Poisonous, Aggression Snake, Fang, Rattlesnake, Poisonous, Aggression

The venom from a Western diamondback rattlesnake is hemotoxic, attacking red blood cells and causing tissue damage to bite victims.


Close on the heels of the Eastern variety is the Western diamondback rattlesnake, native to the U.S. Southwest and northern Mexico. Its venom is hemotoxic, killing cells and tissue, causing blood clotting (or preventing clotting) that can result in massive internal bleeding, and causing possible cardiovascular failure. Some experts think this type of rattlesnake actually outranks the Eastern diamondback in terms of overall deaths to humans.

Other deadly U.S. rattlesnake species include:

  • Timber Rattlesnake
  • Massasauga Rattlesnake
  • Southern Pacific Rattlesnake
  • Banded Rock Rattlesnake
  • Desert Massasauga Rattlesnake

The photo featured at the top of this post is © Nathan A Shepard/

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