Today’s Tick Risk in Indiana – Real-Time Forecast & Activity Map
Check your ZIP code for local tick activity, real-time risk levels, and prevention insights.
Built from CDC and NOAA data
Surveillance Insights
- Annual Lyme Cases
- Steady increase in Lyme; high RMSF risk in south
- Based on CDC surveillance data
- Long-Term Trend
- Northward expansion of Lone Star tick; Lyme filling in central state
- Based on CDC surveillance data
- High Risk Zones
- Brown, Monroe, Porter, Harrison, Hoosier National Forest, Tippecanoe River State Park
Current Situation in Indiana
Indiana is currently experiencing a "tick invasion" that has transformed the state's disease risk profile in less than a generation. The tick forecast for Indiana shows the blacklegged tick (deer tick) expanding rapidly from both the north (Wisconsin/Michigan border) and the south (Kentucky border), bringing Lyme disease to a state where it was once rare. The American Dog tick remains ubiquitous, but the "deer tick" is now the primary concern for serious illness. Southern Indiana, with its hill country and forests, has long had high tick pressure, but the risk is moving north into the agricultural heartland. The Lone Star tick is also established in the southern half of the state, adding Ehrlichiosis and Alpha-gal syndrome to the list of threats.
Snapshot of the current tick situation in Indiana, based on regional surveillance data and seasonal activity patterns.
- Risk Level
- Moderate to High
- Peak Activity
- May - July
- Dominant Vector
- American Dog Tick (Dermacentor variabilis)
Where Ticks Hide in Indiana
Indiana's habitat varies dramatically from the flat, agricultural north to the forested, rolling hills of the south. The southern hardwood forests, particularly in the Hoosier National Forest and Brown County State Park, are prime tick territory with high deer densities. In the north, the risk is concentrated in woodlots, river corridors, and the Indiana Dunes area along Lake Michigan, which shares the high-risk ecology of neighboring Michigan. Suburban development extending into former agricultural lands creates new "edge habitats" that favor ticks. Even city parks in Indianapolis are seeing rising tick numbers.
Seasonal Activity Pattern
Tick season in Indiana is generally April through November, but climate patterns are widening this window. Nymphal deer ticks, the size of poppy seeds, are active in early summer (May-July) and cause the most Lyme infections. Adult deer ticks are active in fall and spring. Lone Star ticks in the south are active throughout the heat of summer. Hunters in southern Indiana face significant risks in the fall, while hikers in the Dunes need to be vigilant in late spring. Winter activity is increasingly common during warm spells.
Check Your Local Tick Risk
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Local Vector Analysis
Understanding which ticks are active in Indiana helps you identify threats and take appropriate precautions.
Deer Tick / Blacklegged Tick
Ixodes scapularis
Appearance: Dark reddish-brown body with black shield on back. Adults are 3-5mm.
Peak Season: Adults: Oct-May | Nymphs: May-Aug
Habitat: Deciduous forests, shady moist areas, and leaf litter. Loves the boundary between lawns and woods.
Diseases: Lyme Disease, Anaplasmosis, Babesiosis, Powassan Virus, B. miyamotoi
Lone Star Tick
Amblyomma americanum
Appearance: Distinct white dot or "lone star" on female's back. Reddish-brown body.
Peak Season: Active from early Spring through late Fall
Habitat: Woodlands with dense undergrowth and around animal resting areas.
Diseases: Ehrlichiosis, Alpha-gal Syndrome, STARI, Heartland Virus, Bourbon Virus
Note: Aggressive hunter. Actively pursues hosts.
American Dog Tick
Dermacentor variabilis
Appearance: Brown with white/grey mottling. Ornate white patterns on shield.
Peak Season: Spring and Summer
Habitat: Grassy fields, walkways, and trails. More tolerant of dry conditions than Deer Ticks.
Diseases: Rocky Mountain Spotted Fever, Tularemia
Lyme Disease
Vector: Deer tick (Ixodes scapularis)
Lyme Disease
Lyme disease is a bacterial infection transmitted by deer ticks. If caught early, it's highly treatable with antibiotics. Left untreated, it can cause serious complications affecting joints, heart, and nervous system.
Early Warning Signs
- Erythema migrans (EM) rash - appears in 70-80% of cases
- Bullseye rash (circular red rash with clear center)
- Rash appears 3-30 days after bite
- Fever and chills
Progression & Symptoms
- Severe headaches and neck stiffness
- Facial palsy (loss of muscle tone on one or both sides of face)
- Arthritis with severe joint pain, especially knees
Prevention Strategies
The best way to avoid tick-borne diseases is to prevent tick bites in the first place. These strategies work together to create multiple layers of protection.
Permethrin-Treated Clothing
Permethrin is an insecticide that kills ticks on contact. When applied to clothing, it remains effective through multiple washes.
Daily Tick Checks
Since disease transmission typically requires 24-48 hours of attachment, finding and removing ticks quickly dramatically reduces infection risk.
Landscaping Defense
Creating a tick-hostile environment in your yard reduces the chance ticks will be waiting when you step outside.
Shower Within 2 Hours
Showering after outdoor activity gives you a chance to wash off ticks before they bite.
Tick Bite Protocol
Acting quickly and correctly is your best defense against infection.Follow these 6 critical steps.
Don't Panic
Most tick bites do not transmit disease, especially if removed quickly.
- Infection rates vary by region (20-50%)
- Transmission usually takes 24-48 hours
- Stay calm and use proper technique
Gather Tools
Use fine-tipped tweezers. Avoid fingers or chemicals.
- Fine-tipped tweezers are best
- Rubbing alcohol for cleaning
- Small container to save the tick
Grasp & Pull
Grasp close to skin and pull upward with steady pressure.
- Grab mouthparts near skin (not body)
- Pull straight up—don't twist
- Maintain steady, even pressure
Clean Area
Disinfect the bite site and your hands thoroughly.
- Wash with soap and water
- Apply rubbing alcohol
- Wash hands well
Save Tick
Keep the tick in a sealed container for potential testing.
- Seal in bag or container
- Label with date and location
- Bring to doctor if symptoms appear
Monitor (30 Days)
Watch for rash or flu-like symptoms for a month.
- Check for expanding rash daily
- Watch for fever or fatigue
- Seek care if you feel unwell
When does tick season end in Indiana?
Tick activity winds down after the first hard freeze, which in Indiana typically arrives around Oct 16. See the local first-frost window and city-by-city freeze dates.
Indiana first frost datesAlso worried about mosquitoes in Indiana?
West Nile virus, EEE, and the local mosquito season vary by state. Check your Indiana mosquito risk profile.
View Indiana mosquito forecastStay Safe in Indiana
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