Are There Fire Ants in Texas?
Yes, fire ants are well established throughout most of Texas, especially in the central, eastern, and southern regions. These small reddish-brown ants build large mounds in open areas and can inflict painful stings. Understanding where they live, how to recognize them, and what to do if stung will help you stay safe when spending time outdoors in Texas.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 22, 2026.
Red Imported Fire Ant · Sam Kieschnick CC BY
Red Imported Fire Ant · Emmett Collins-Sussman CC BY
Red Imported Fire Ant · Meghan Cassidy CC BY-SA
- 1
- species recorded
- 11,715
- GBIF records
- April, January, February
- peak months
Yes, fire ants are in Texas. Next you'll want:
Real sighting data, source iNaturalist
19,598 verified observations on iNaturalist of fire ant have been recorded in Texas, most often in April, January, February.
When fire ant are recorded in Texas
Yes, fire ants are well established throughout most of Texas, especially in the central, eastern, and southern regions. These small reddish-brown ants build large mounds in open areas and can inflict painful stings. Understanding where they live, how to recognize them, and what to do if stung will help you stay safe when spending time outdoors in Texas.
Are They in Texas?
Fire ants are firmly established across much of Texas and have been present for several decades. They thrive in the warm climate and are found in nearly every county, from the pine forests of East Texas to the prairies of North Texas and the brushland of South Texas. These invasive ants prefer open, sunny areas like pastures, lawns, and parks where they build distinctive reddish-brown mounds. Fire ants have become one of the most common and bothersome insects in Texas, affecting residential areas, agricultural lands, and recreational spaces. They're particularly abundant in areas with moisture and open ground. The populations remain steady year-round in the warmer parts of the state, though they become less active during winter. For most Texans, encountering fire ants is not a question of if, but when and where. Learning aboutFire Ants in Texashelps you prepare for safe outdoor activities.
How Dangerous Are They?
A fire ant sting causes immediate sharp pain and usually creates a small white pustule within 24 hours. For most people, the sting is no more serious than a bee sting, though the pain is often more intense and longer lasting. Swelling, itching, and soreness typically fade within a few days. A small percentage of people have allergic reactions that cause more widespread swelling or difficulty breathing, which requires immediate medical attention. Death from fire ant stings is extremely rare in healthy people. Children and infants are at higher risk for serious reactions because they may panic or pull off the ants before all stings occur. People with compromised immune systems or those allergic to insect venom should be especially cautious. Multiple stings from a large colony can pose more risk than a single sting. Most cases resolve with basic first aid and over-the-counter pain relief. Anyone stung multiple times in the face or neck, or who shows signs of an allergic reaction, should seek medical care immediately. For more on fire ant in Texas, see ourTexas fire ant guide.
How to Recognize Them
Fire ants are small, ranging from one-eighth to three-sixteenths of an inch in length. They are reddish-brown to dark red, which distinguishes them from common black or brown garden ants. Their mounds are the most obvious sign; they are loose, crumbly, and reddish-brown, often appearing overnight in lawns, gardens, and fields. Mounds can reach heights of 18 inches and may contain up to 200,000 ants. Unlike many ant species, fire ants don't create entrance holes at the mound's top. When disturbed, they swarm quickly and attack aggressively. You can identify their behavior by their rapid, fierce response to vibration or disturbance. If you step on or near a mound, hundreds of ants will rush to attack. They climb up your shoe or pant leg before stinging. The ants remain attached during stinging and may sting multiple times. Look for mounds in open, sunny areas, especially near moisture. Concrete cracks, landscape edges, and fence lines are also common nesting spots in yards and parks. You can also browseTexas wildlife.
What to Do If You Are Bitten or Stung
If stung, remain calm and remove the attacking ants immediately by brushing them off your skin. Move away from the mound to prevent further stings. Wash the area with soap and water to reduce infection risk. Remove any tight rings or jewelry from the stung area before swelling begins. Apply a cool compress for 10 to 15 minutes to reduce pain and swelling. Do not squeeze the pustule that forms, as this can introduce bacteria and cause infection. Over-the-counter antihistamine cream or oral pain relievers can help manage discomfort. Resist scratching, even though the area will itch intensely; scratching can lead to infection. Most stings resolve within a few days without medical intervention. 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. Seek medical care if you experience difficulty breathing, swelling of the face or throat, or severe allergic symptoms. Keep the affected area clean and monitor for signs of infection.
How to Prevent Encounters
The best defense is awareness and prevention. Clear your yard of debris, woodpiles, and leaf litter where fire ants may nest. Keep grass cut short and remove dead wood or branches. Water your lawn and garden during cooler months to deter mound building, as fire ants prefer drier soil. When hiking or spending time outdoors, watch where you walk and avoid stepping on visible mounds. Wear closed-toe shoes and long pants when walking through tall grass or brushy areas. Tuck your pants into your socks for extra protection. Avoid disturbing mounds even if you're curious about them. When camping, set up your tent away from obvious mound locations and inspect your sleeping area. Check your shoes and clothing before putting them on, especially if they've been left on the ground. Keep food sealed and trash secured, as ants may be attracted to food sources. Wear insect repellent containing DEET if spending extended time in areas with known fire ant populations. CheckTexas wildliferesources for specific area warnings during peak activity seasons.
Where in Texas and When
Fire ants are found throughout Texas in a variety of habitats, from the piney woods of East Texas to the open prairies and grasslands of Central Texas, and all the way to the coastal plains of the Gulf Coast. They thrive in disturbed areas, pastures, lawns, gardens, parks, and agricultural lands. They are less common in dense forests but readily colonize forest edges and clearings. Fire ants are active year-round in Texas, though their activity levels fluctuate with temperature. During warm months from spring through fall, they are most aggressive and most likely to sting. In winter, activity slows significantly, but they do not disappear. Mounds are easiest to spot after rainfall when moisture stimulates ant activity. Spring and summer are the peak seasons for fire ant stings in Texas. Late summer and early fall can also bring increased encounters as ants prepare for cooler months. In urban and suburban areas, they are found in parks, golf courses, residential yards, and along roadsides. Regions near rivers, creeks, and other water sources may have higher densities of fire ant colonies.
Harmless Lookalikes
Many common Texas ants are mistaken for fire ants but are completely harmless. The odorous house ant is small and dark, but lacks the aggressive behavior and painful sting of fire ants. Carpenter ants are larger and black or reddish-black, and while they can bite, they do not sting and are far less aggressive. Pharaoh ants are tiny and yellow to reddish, and they form trails rather than obvious mounds. Acrobat ants are small and may be reddish-brown, but they do not build the distinctive loose mounds that fire ants create. Argentine ants form shallow trails and are much smaller and less aggressive than fire ants. The key distinguishing feature is the mound: fire ant mounds are distinctive, loose, crumbly, and reddish-brown. Most other ant species either build no visible mound or create flatter, harder structures. Behavior is also telling; fire ants swarm aggressively when their mound is disturbed, while most Texas ants either avoid disturbance or move slowly. If you see a large, loose mound in an open area and ants swarm when you approach, it is almost certainly a fire ant colony. Understanding lookalikes helps reduce unnecessary concern about harmless ant species.
Frequently Asked Questions
**Are fire ants deadly?** Fire ant stings are painful but rarely serious in healthy adults. Death is extremely rare and usually occurs only in people with severe allergic reactions or those who receive hundreds of stings. **How common are fire ant stings in Texas?** Because fire ants are so widespread in Texas, stings are fairly common, especially during warm months. Anyone spending significant time outdoors in Texas should be aware of the risk. **What attracts fire ants to a house?** Fire ants are attracted to moisture, food sources, and suitable nesting sites. Moist soil, spilled food, pet food left outside, and compost piles can all encourage colonies near homes. Keeping the yard clean and reducing moisture helps discourage them. **What should I do if I see one?** Do not disturb the mound or attempt to step on it. Instead, avoid the area and warn others, particularly children and pets. If you are stung, calmly walk away from the mound and follow first aid steps. For more information, visitour wildlife guidesandmore on Fire Ants in Texasto learn additional safety tips.
Plan your trip
Best time to see fire ant in Texas: April, January, February
See the month-by-month sighting calendar.
Plan your fire ant sighting in Texas
11,715 verified fire ant records have been logged in Texas, most recently in 2026. See the GBIF records.
Where to look in Texas
- Amistad National Recreation Area · Wildlife Watching, Birdwatching · Find hotels
- Big Bend National Park · Wildlife Watching, Birdwatching · Find hotels
- Big Thicket National Preserve · Wildlife Watching, Birdwatching · Find hotels
- Chamizal National Memorial · Wildlife Watching, Birdwatching · Find hotels
- Fort Davis National Historic Site · Wildlife Watching, Birdwatching · Find hotels
- Guadalupe Mountains National Park · Wildlife Watching, Birdwatching · Find hotels
Frequently asked questions
Are They in Texas?+
Fire ants are firmly established across much of Texas and have been present for several decades. They thrive in the warm climate and are found in nearly every county, from the pine forests of East Texas to the prairies of North Texas and the brushland of South Texas. These invasive ants prefer open, sunny areas like pastures, lawns, and parks where they build distinctive reddish-brown mounds. Fire ants have become one of the most common and bothersome insects in Texas, affecting residential areas, agricultural lands, and recreational spaces. They're particularly abundant in areas with moisture and open ground. The populations remain steady year-round in the warmer parts of the state, though they become less active during winter. For most Texans, encountering fire ants is not a question of if, but when and where. Learning aboutFire Ants in Texashelps you prepare for safe outdoor activities.
How Dangerous Are They?+
A fire ant sting causes immediate sharp pain and usually creates a small white pustule within 24 hours. For most people, the sting is no more serious than a bee sting, though the pain is often more intense and longer lasting. Swelling, itching, and soreness typically fade within a few days. A small percentage of people have allergic reactions that cause more widespread swelling or difficulty breathing, which requires immediate medical attention. Death from fire ant stings is extremely rare in healthy people. Children and infants are at higher risk for serious reactions because they may panic or pull off the ants before all stings occur. People with compromised immune systems or those allergic to insect venom should be especially cautious. Multiple stings from a large colony can pose more risk than a single sting. Most cases resolve with basic first aid and over-the-counter pain relief. Anyone stung multiple times in the face or neck, or who shows signs of an allergic reaction, should seek medical care immediately. For more on fire ant in Texas, see ourTexas fire ant guide.
More wildlife in Texas