3564
Tick Reports
High
Risk Level
3+
Species Found
Tick Species in Illinois
Primary vector for Lyme disease, anaplasmosis, and babesiosis. Found in wooded and grassy areas.
Common on dogs and humans. Primary vector for Rocky Mountain spotted fever.
Very aggressive biter. Can cause Alpha-gal syndrome (red meat allergy) and ehrlichiosis.
Most Reported in Illinois
Tick-Borne Diseases in Illinois
Tick Season in Illinois
Active Season
April – October
Peak Danger
May – July
During peak months in Illinois, nymph-stage ticks (the size of a poppy seed) are actively feeding. These tiny ticks are responsible for most disease transmission because they're difficult to spot. Always do thorough tick checks after spending time outdoors, especially during May – July.
See month-by-month tick activity guide →Tick Prevention Tips for Illinois
- 1
Use EPA-registered tick repellent
Apply DEET (20–30%) to exposed skin and permethrin (0.5%) to clothing, shoes, and gear.
- 2
Wear protective clothing outdoors
Long sleeves, long pants tucked into socks, and light colors to spot ticks.
- 3
Do daily tick checks
Check your body, children, and pets after outdoor activities. Focus on the scalp, armpits, groin, and behind ears.
- 4
Shower within 2 hours
Showering after coming inside can wash off unattached ticks and is a good time to do a tick check.
- 5
Maintain your yard
Keep grass short, remove leaf litter, and create a 3-foot gravel barrier between your lawn and wooded areas.
- 6
Protect your pets
Use veterinarian-recommended tick prevention year-round. Check pets daily for ticks.
Track Live Tick Activity in Illinois
See the latest tick bite and sighting reports from Illinois on our interactive map.