LoneStarMapWisconsin • Emerging
Lone Star Ticks in Wisconsin: Map, Season, Alpha-Gal Awareness & Prevention
Lone Star tick establishment in Wisconsin is limited, but CDC detected moderate-to-high numbers of suspected AGS cases in some counties.
Last reviewed: June 2, 2026 · Educational only — not medical advice.
Risk snapshot
Wisconsin
Lone Star tick establishment in Wisconsin is limited, but CDC detected moderate-to-high numbers of suspected AGS cases in some counties.
Peak season
May – September
Common habitats
Who should be extra aware
Are Lone Star ticks found in Wisconsin?
Wisconsin is within or near the broader Lone Star tick range, with reports in parts of the state. Awareness levels vary by county, and activity is typically highest during may – september. While Lone Star establishment is limited, CDC reporting noted notable suspected-AGS counts in parts of Wisconsin. Talk to a clinician about symptoms and follow general tick prevention.
When is tick season in Wisconsin?
Peak Lone Star tick activity in Wisconsin is typically May – September. Plan extra prevention during these months — repellent, permethrin-treated clothing, and daily tick checks for kids and pets. In warmer regions, ticks can be active longer.
Can tick bites in Wisconsin be linked to alpha-gal syndrome?
A Lone Star tick bite has been associated with alpha-gal syndrome — a delayed allergy to mammalian meat — in some individuals. Not every bite causes it, and only a licensed clinician can diagnose it. Learn the symptoms or read the alpha-gal guide.
What to do if you find a tick after being outside in Wisconsin
Remove the tick with fine-tipped tweezers, clean the area, save a photo, and note the date and location. Watch for symptoms over the following weeks and contact a licensed medical professional if a rash, fever, fatigue, or food reaction develops.
Prevention checklist for Wisconsin
- Use EPA-registered repellent (DEET, picaridin, or oil of lemon eucalyptus)
- Treat clothing and gear with permethrin
- Wear long sleeves and tuck pants into socks in brushy areas
- Stay on cleared trails and avoid tall grass and leaf litter
- Shower within two hours of coming indoors
- Do daily tick checks on people and pets during the season
Join the tick-awareness early list
We're building optional seasonal reminders for Wisconsin. Join the list and we'll email you when they launch.
Sources & local resources for Wisconsin
- Where Ticks LiveCDC
The Lone Star tick is widely distributed in the Northeast, South, and Midwest U.S.
- Lone Star Tick SurveillanceCDC
County-level established vs. reported records. 'Established' = 6+ ticks or multiple life stages collected in 12 months.
- Alpha-gal SyndromeCDC
What alpha-gal syndrome is, symptoms, and its association with tick bites.
- Current and Future Distribution of the Lone Star Tick in North AmericaRaghavan et al., PLOS ONE (2019)
Ecological niche modeling of Amblyomma americanum range and projected northward expansion.
- Find the Repellent That Is Right for YouEPA
Search tool for EPA-registered repellents (DEET, picaridin, oil of lemon eucalyptus).
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Lone Star tick awareness in Wisconsin
Peak season: May – September
Wisconsin tick & alpha-gal FAQ
The questions Wisconsin residents search for most.
Are Lone Star ticks in Wisconsin?+
Yes — Wisconsin is within or near the broader Lone Star tick range. Reports vary by county, and activity is generally highest during may – september.
When is tick season in Wisconsin?+
Peak Lone Star tick activity in Wisconsin is typically May – September. In warmer parts of the state, ticks can be active longer into the year.
Can I get alpha-gal syndrome from a tick bite in Wisconsin?+
Alpha-gal syndrome has been associated with Lone Star tick bites in regions of Wisconsin. Not every bite causes AGS. If you develop hives, swelling, stomach pain, or other reactions 2–6 hours after eating mammalian meat, talk to a licensed medical professional.
How do I report or identify a tick I found in Wisconsin?+
Save the tick in a sealed bag with a moist paper towel, take a clear photo, and contact your state health department or a university extension program. Some accept ticks for identification or testing.
What should I do after a tick bite in Wisconsin?+
Remove the tick with fine-tipped tweezers, clean the area, save a photo, and note the date and location. Watch for symptoms over the following weeks and contact a medical professional if a rash, fever, fatigue, or food reaction develops.
Related nearby states
Lone Star tick range, peak season, and awareness vary across the U.S.
See all 51 state pages →