You can find lone star ticks across much of the eastern, southeastern, south-central, and midwestern United States.
The lone star tick, Amblyomma americanum, is especially common in wooded areas, brush, tall grass, and places where deer and other wildlife move.
Lone star ticks live across a broad part of the United States, so you may encounter them outside the traditional South and Southeast, including parts of the Midwest and Northeast.
Tick presence varies by county, habitat, weather, and the quality of local tick surveillance.
A map can show where ticks have been found, but it cannot predict whether you will receive a bite or develop an illness.
Current U.S. Range and Emerging Areas
The lone star tick’s primary range stretches through the eastern United States, from Texas and Missouri across Georgia, North Carolina, Florida, Virginia, Tennessee, Kentucky, Kansas, Arkansas, South Carolina, and West Virginia.
Reports and established populations also extend into parts of Iowa, Illinois, Indiana, Ohio, New York, New Jersey, Pennsylvania, Connecticut, and Wisconsin.
The species is also native to parts of Mexico.
Core Areas Across the South and East
You are most likely to encounter high lone star tick activity in the Southeast, South-Central states, and much of the Mid-Atlantic.
Texas, Missouri, Georgia, Florida, North Carolina, Tennessee, Kentucky, Arkansas, Virginia, and South Carolina contain extensive suitable habitat.
Wooded edges, second-growth forests, dense underbrush, and deer corridors support local populations.
The lone star tick’s documented range includes much of the eastern United States and Mexico.
Midwest and Northeast Expansion
Lone star ticks occur in portions of Iowa, Illinois, Indiana, Ohio, Pennsylvania, New Jersey, New York, Connecticut, and Wisconsin.
Reports near the northern edge of the range may represent isolated findings, expanding populations, or transported ticks, so not every report proves widespread establishment.
Warmer conditions, abundant white-tailed deer, suitable vegetation, and movement of people and animals affect where people detect ticks.
Regional vector specialists describe the species as reaching parts of the Midwest and Pennsylvania, with its northern boundary varying by location.
How to Read County-Level Surveillance Maps
A county shaded on a surveillance map means someone has collected, reported, or documented lone star ticks there.
An unshaded county does not guarantee that ticks are absent, especially where sampling is limited.
Check the map’s legend and date before you interpret it.
Distinguish between established populations, isolated detections, and public reports.
Educational tools such as the interactive Lone Star Tick awareness map can help you explore reports, but they do not replace official CDC or state health department surveillance.
Habitats and Seasons That Raise Exposure Chances
You can encounter lone star ticks wherever vegetation provides a place to climb and a host travels nearby.
Exposure rises along brushy boundaries, trails, fields, and leaf-covered ground, especially during warm months when people, dogs, and cats move through habitat.
Woodland Edges, Tall Grass, and Leaf Litter
Lone star ticks commonly live in forest margins, dense shrubs, second-growth woodland, tall grass, and leaf litter.
They use a behavior called questing, climbing vegetation and extending their front legs until a passing host brushes against them.
You may pick up a tick when you walk beside a trail, push through weeds, sit on leaves, or handle outdoor gear.
Lone star ticks can attach to people at any life stage and may also be carried indoors by dogs or cats.
When Adults, Nymphs, and Larvae Are Active
Adults often become active in spring, with activity continuing into early summer.
Nymphs are commonly active from late spring through summer, while groups of larvae, sometimes called seed ticks, become noticeable in mid-to-late summer.
In much of the range south of New York, adults generally seek hosts from March through June, nymphs from May through July, and larvae from July through September.
Local weather can shift these periods.
Kentucky guidance also describes activity from March through September, with larvae particularly abundant in August.
Why Deer and Local Conditions Matter
White-tailed deer serve as important hosts for adult lone star ticks and help maintain and disperse populations.
Dense vegetation, humid leaf litter, wildlife trails, and a steady supply of hosts create favorable conditions.
Your risk can differ sharply between nearby properties.
A mowed lawn may have fewer suitable microhabitats than a brushy woodland edge, but ticks can still be carried into lawns by people, pets, or wildlife.
What Location Can and Cannot Tell You About Health Risk
A lone star tick finding shows that the species has been detected in a region, but not every tick carries a pathogen.
Your health risk depends on the tick species, life stage, attachment, local pathogen activity, and symptoms after a bite.
Tick Presence Is Not the Same as Disease Risk
Lone star ticks can transmit ehrlichiosis caused by Ehrlichia chaffeensis and Ehrlichia ewingii.
They may also be involved in tularemia, Heartland virus, Bourbon virus, and southern tick-associated rash illness, or STARI.
A lone star tick bite may also trigger alpha-gal syndrome, an immune reaction to alpha-gal that can cause sensitivity to mammalian meat and, in some people, serious allergic reactions or anaphylaxis.
The presence of a tick does not confirm transmission, and many bites do not lead to illness.
Conditions Linked to Lone Star Tick Bites
Seek medical advice if you develop fever, chills, headache, unusual fatigue, muscle aches, swollen glands, a spreading rash, breathing difficulty, or digestive symptoms after a tick bite.
Alpha-gal reactions may occur hours after eating mammalian meat or products containing alpha-gal, rather than immediately after the bite.
STARI can produce an expanding rash resembling the rash associated with Lyme disease.
Current evidence does not show that Borrelia burgdorferi, the bacterium that causes Lyme disease, is transmitted by lone star ticks.
How Lone Star Ticks Differ From Deer Ticks and Dog Ticks
An adult female lone star tick usually has a single pale spot near the center of its back.
Deer ticks, also called blacklegged ticks, are Ixodes scapularis and are the main Lyme disease vector in the eastern United States.
American dog ticks, Dermacentor variabilis, have different markings and can transmit spotted fever group Rickettsia and other pathogens.
Because tick identification can be difficult, save the tick in a sealed container or take a clear photograph if you need professional identification.
The CDC’s tickborne disease guidance can help you match symptoms and prevention steps to your situation.
Checking Your Area and Reducing Bite Risk
You can make location information more useful by checking current state or county surveillance, then combining it with practical tick prevention.
Protective clothing, repellents, prompt tick checks, and correct removal reduce the chance of a prolonged attachment.
Use Official Local Surveillance Sources
Check your state health department, state university extension service, and CDC tick surveillance pages for the most reliable local information.
Look for the collection year, county coverage, and whether a map shows confirmed specimens, reported bites, or modeled habitat.
Treat crowdsourced maps as supplementary information.
A lack of local reports may reflect limited testing rather than a true absence of lone star ticks.
Prevent Bites Before Going Outdoors
Stay near the center of cleared trails and avoid brushing against tall grass, shrubs, and leaf litter.
Wear light-colored clothing, tuck pants into socks, and use an EPA-registered repellent according to its label.
Clothing treated with permethrin can provide additional protection when used exactly as directed.
After outdoor activity, place clothing in a hot dryer when appropriate, shower, and inspect your body, hair, gear, and pets.
Pay close attention to the waist, groin, armpits, behind the knees, and scalp.
What to Do After Finding an Attached Tick
Remove the tick promptly with fine-tipped tweezers. Grip it close to your skin and pull upward with steady pressure.
Clean the bite area and your hands. Avoid twisting, burning, or coating the tick with substances.
Record the date and location of the exposure. Watch for symptoms during the following days and weeks.
Contact a healthcare professional if you develop concerning symptoms. Mention the possible lone star tick bite and where exposure occurred.
