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Lyme Disease

Within the United States, Lyme disease occurs most often in the Northeast and Upper Midwest. In Wisconsin, Lyme disease is the most common illness spread by ticks.

The ticks that spread Lyme disease can be found in every county in Wisconsin. Not all tick bites will make you sick, but it’s important to protect yourself and your family while enjoying time outdoors.

Lyme disease is preventable and treatable. Learn more about Tick Bite Prevention.

Read about Treatment for Lyme disease from the CDC (Centers for Disease Control and Prevention).

About Lyme Disease

Adult tick with black spot on back rests on a leaf

Learn more about Lyme disease, including signs and symptoms, treatment, and resources.


Line graph representing data trends with blurred people in background

Maps and charts with Lyme disease data.

Reporting and Surveillance

A hand on computer mouse with a keyboard

Local health departments and health care providers can learn about disease reporting, testing, treatment, and more.

Tick Bite Prevention

Adult applying insect repellent to a child at a park

Tips to prevent tick bites.

Learn more about Lyme disease from the CDC.

Contact us

Questions about illnesses spread by ticks? We’re here to help.

Bureau of Communicable Diseases
Phone: 608-267-9003
Fax: 608-261-4976

Last revised November 22, 2023