Oklahoma is home to several centipede species, but two stand out as the ones you’re most likely to encounter: the giant redheaded centipede, which lives outdoors in rocky and wooded areas, and the house centipede, which frequently turns up inside homes. Neither poses a serious medical threat, but knowing what you’re dealing with helps you respond appropriately and keep them out of your living space.
The Giant Redheaded Centipede
The giant redheaded centipede (sometimes called the Texas redheaded centipede) is the largest and most striking centipede in Oklahoma. Specimens average about 6.5 inches long and can reach nearly 8 inches. It has 21 pairs of legs, a chestnut-red head and first two body segments, a black trunk tinged with green, and yellow legs. The final pair of legs at the rear are oversized, black with yellow tips. This bold coloring is a warning signal to predators, advertising that the animal can deliver a painful bite.
These centipedes live in rocky woodland habitats and spend their time under stones and logs, especially during warmer months. They’re nocturnal predators that hunt insects, spiders, small lizards, and even mice. You’re unlikely to stumble across one in a suburban yard unless you have wooded or rocky terrain nearby, but they do occasionally wander into garages, sheds, or homes at ground level.
House Centipedes
The house centipede is the species most Oklahomans actually see indoors. Its body is only 1 to 1.5 inches long, but its 15 pairs of extremely long, banded legs make it look much bigger and faster than it really is. The body is grayish-yellow with three dark stripes running down the back. They move quickly across walls and floors, which is usually what startles people.
House centipedes feed on small insects, insect larvae, and spiders, making them genuinely beneficial. They prefer damp areas: basements, bathrooms, closets, crawl spaces, and the bark of firewood stored indoors. Most encounters happen when one gets trapped in a bathtub or sink, or appears on a bathroom wall at night. According to Oklahoma State University Extension, the house centipede could technically bite but is considered harmless to people.
Other Species You Might See
Oklahoma’s varied terrain, from the Ouachita Mountains in the southeast to the mixed-grass prairies in the west, supports several smaller centipede species in the soil centipede and stone centipede groups. These are typically under two inches long, brownish or tan, and live entirely outdoors in leaf litter, mulch, and under rocks. You might turn one up while gardening but would rarely notice them otherwise. They lack the size and venom capacity to cause any meaningful bite.
What a Centipede Bite Feels Like
House centipede bites are essentially a non-issue. The giant redheaded centipede is a different story. Its bite causes intense, sudden pain at the site, along with swelling, redness, and a burning or throbbing sensation. Some people experience numbness and tingling around the wound. The pain can be significant enough to cause nausea, dizziness, headache, or general restlessness.
The good news is that centipede bites are not broadly life-threatening. The vast majority result in mild to moderate local pain that resolves within hours to a few days with basic wound care and over-the-counter pain relief. Only three well-documented human deaths from centipede bites exist in the medical literature worldwide. For context, bee and wasp stings kill hundreds of Americans per decade, while centipede-related fatalities in the U.S. numbered just two over a similar ten-year period. Allergic reactions are possible but rare.
If you’re bitten by a large centipede, clean the wound, apply ice for swelling, and take a pain reliever. Watch for signs of infection or an allergic reaction (widespread swelling, difficulty breathing, hives). Most bites need nothing more than time.
Why Centipedes Enter Oklahoma Homes
Centipedes need two things: moisture and prey. Oklahoma’s humid summers, especially in the eastern half of the state, create ideal conditions. Homes with damp basements, leaky pipes, poor ventilation, or cluttered storage areas offer both the humidity centipedes require and a steady supply of the small insects they hunt. If you’re seeing centipedes regularly indoors, it usually means you also have an underlying pest population they’re feeding on.
They get inside through foundation cracks, gaps around windows, spaces under doors, and openings where utility pipes enter the house. Firewood brought inside is another common entry route, especially for the giant redheaded centipede.
How to Keep Centipedes Out
Moisture control is the single most effective step. Keeping indoor relative humidity below 50% makes your home far less attractive to centipedes and to the insects they eat. Run exhaust fans in bathrooms and kitchens, use a dehumidifier in basements and crawl spaces, and fix leaky pipes and faucets promptly.
Seal their entry points next. Caulk cracks in the foundation and around windows, install door sweeps on exterior doors, and cover vents with fine mesh screens. Pay special attention to gaps where utility pipes penetrate walls.
Outside the house, remove leaf litter and debris near the foundation, keep mulch at least six inches away from exterior walls, and cut tall grass and vegetation along the perimeter. These changes eliminate the damp hiding spots centipedes use as staging areas before entering.
Because centipedes are predators, reducing their food supply drives them elsewhere. A general pest control approach that targets the small insects in your home (ants, silverfish, cockroaches, spiders) removes the incentive for centipedes to stay. For a non-chemical option, food-grade diatomaceous earth can be sprinkled into cracks, along door thresholds, and in corners of dry areas. It damages the waxy coating on arthropod exoskeletons and dehydrates them over time. Use it only in dry spots, since moisture renders it ineffective, and wear a mask during application to avoid inhaling the fine powder.
Essential oils offer a mild, temporary deterrent. Peppermint oil (15 to 20 drops per cup of water in a spray bottle) applied along baseboards, window frames, and cracks in floorboards can discourage centipedes from crossing those areas. Tea tree, eucalyptus, and lavender oils work similarly. These need to be reapplied every few days as the scent fades, so they’re best used as a supplement to the structural and moisture fixes rather than a standalone solution.