Are ticks a problem in Cook County?

There have been 23 tick reports near Cook County, IL, with 0 bites and 23 sightings. The most common species reported is the Unidentified. Check the Tick Map for the latest 2026 tick activity.

What kind of ticks are in Cook County?

The most commonly reported tick species in Cook County include Unidentified, Deer Tick. Each species carries different disease risks — see our species guide for identification help.

Tick Map

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Ticks in Cook County, IL

23 tick reports from the Cook County, IL area.

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Total Reports

Sightings

Bites

Species Found in Cook County

Unidentified22 (96%)

Deer Tick1 (4%)

Risk: High — carries Lyme disease

Tick Safety in Cook County

Ticks are active in Cook County, IL and surrounding areas. The most commonly reported species is the Unidentified, making up 96% of reports.

✓Wear light-colored clothing when walking in wooded areas or tall grass
✓Use EPA-registered tick repellent (DEET, picaridin, or IR3535)
✓Do a full-body tick check after being outdoors — especially behind ears, hairline, and waistband
✓Shower within 2 hours of coming inside
✓If bitten, remove the tick with fine-tipped tweezers and monitor for symptoms for 30 days