Yes, ticks are well established in Houston and the surrounding Harris County area. The warm, humid climate of Southeast Texas creates ideal conditions for multiple tick species, and they’re active year-round. A large-scale survey conducted in Harris County collected over 1,200 ticks across five different species, confirming that Houston residents face real tick exposure during everyday outdoor activities.
Which Tick Species Live in Houston
The Harris County survey found that blacklegged deer ticks (sometimes called Ixodes ticks) made up the largest share of collected specimens at 41.2%, followed by Gulf Coast ticks at 27.7% and lone star ticks at 15.8%. American dog ticks and brown dog ticks were also present but in much smaller numbers.
Each of these species behaves differently. Blacklegged deer ticks are the primary carriers of Lyme disease bacteria and tend to live in wooded, shaded areas with leaf litter. Lone star ticks are aggressive biters known for seeking out hosts over longer distances and are linked to a meat allergy called alpha-gal syndrome. Gulf Coast ticks prefer coastal grasslands and can transmit a form of spotted fever. The brown dog tick is unusual because it can complete its entire life cycle indoors, making it a particular concern for pet owners.
Baylor College of Medicine’s Texas Tick Project identifies six main tick species in Texas that matter for human health, and Houston’s environment supports most of them.
Where You’re Most Likely to Encounter Ticks
Ticks in Houston aren’t limited to deep woods or rural trails. They’re found in grassy areas, parks, hiking trails, and landscaped spaces throughout the metro area. Houston Methodist physicians have noted that exposure can happen during ordinary activities like jogging, yard work, or simply spending time on a patio. Anywhere with grass, shrubs, or leaf litter can harbor ticks waiting for a host to brush past.
Houston’s extensive park system, bayou trails, and greenbelts provide connected corridors of habitat. If you walk your dog along Buffalo Bayou, hike in Memorial Park, or let your kids play in a neighborhood green space, you’re in tick territory. Ticks position themselves on the tips of grass blades and low vegetation, latching on when you or your pet walks by.
When Ticks Are Most Active
Ticks are active year-round in Texas, but populations swell during the warmer months and typically peak in summer before declining in fall. Houston’s mild winters mean ticks never fully go dormant the way they do in northern states. A cold snap might slow them down temporarily, but the subtropical humidity keeps them viable through most of the year.
Spring and summer are the highest-risk seasons. That’s when nymphs (juvenile ticks roughly the size of a poppy seed) are most active, and their small size makes them easy to miss on your skin. These tiny nymphs are responsible for a large share of tick-borne disease transmission because people don’t notice them until well after feeding begins.
Tick-Borne Diseases in Southeast Texas
Houston-area ticks can carry at least 12 different bacterial pathogens that infect humans. The diseases of greatest concern in Texas include Rocky Mountain spotted fever, other spotted fever rickettsiosis, ehrlichiosis, anaplasmosis, Lyme disease, and alpha-gal syndrome.
Rocky Mountain spotted fever and related spotted fevers are the most serious acute threats. Without prompt treatment, Rocky Mountain spotted fever can be fatal. Symptoms start with fever, headache, and muscle pain, often followed by a characteristic rash that spreads from the wrists and ankles. Ehrlichiosis and anaplasmosis cause similar flu-like symptoms and are transmitted by lone star and blacklegged ticks respectively.
Lyme disease gets the most attention nationally, but Texas is a low-incidence state. Between 2000 and 2020, Texas averaged just 85 reported human cases per year, and the majority of those were actually acquired in high-incidence northeastern states rather than locally. That said, blacklegged deer ticks capable of carrying Lyme bacteria are clearly present in Harris County in significant numbers, so local transmission isn’t impossible.
Alpha-gal syndrome deserves special mention because it’s increasingly recognized in the South. After a lone star tick bite, some people develop an immune reaction that causes allergic responses to red meat and other mammalian products. Symptoms typically appear three to six hours after eating beef, pork, or lamb and can range from hives to severe anaphylaxis. With lone star ticks making up nearly 16% of Houston-area ticks, this is a real local concern.
How to Protect Yourself
Prevention in Houston comes down to repellent, clothing choices, and thorough tick checks. For skin, insect repellent should be applied lightly to all exposed areas. If you’re also wearing sunscreen, put that on first and layer repellent on top. Apply repellent outdoors to avoid breathing it in, keep it away from cuts or broken skin, and wash it off with soap and water when you come back inside. For children, apply it for them and avoid their hands, since kids frequently touch their eyes and mouth.
For clothing and gear, permethrin is more effective than standard repellent at keeping ticks off fabric. Spray it on pants, socks, shoes, and shirts outdoors, then let everything dry completely before wearing or bringing it inside. A single application of permethrin lasts about six weeks or six washes, so you don’t need to reapply before every outing.
After any time spent in grassy or wooded areas, do a full-body tick check. Pay close attention to your hairline, behind your ears, armpits, waistband, and behind your knees. Ticks often crawl upward looking for warm, hidden spots before they attach. Shower within two hours of coming indoors, and toss your clothes in the dryer on high heat for 10 minutes to kill any ticks hitching a ride. Check your pets thoroughly too, especially around their ears, between toes, and under collars.
What to Do if You Find a Tick
If you find a tick attached to your skin, use fine-tipped tweezers to grasp it as close to the skin surface as possible and pull straight up with steady, even pressure. Don’t twist, crush, or try to burn it off. Clean the bite area with rubbing alcohol or soap and water afterward.
Not every tick bite leads to illness. Most don’t. But if you develop a fever, rash, headache, or muscle aches in the days or weeks following a bite, that timeline is important information to share with your doctor. Tick-borne infections are highly treatable when caught early but can become serious if delayed. Save the tick in a sealed bag or take a photo if you can, since identifying the species helps determine which infections to watch for.