Regions

U.S. Regions Most Affected by Tick-Borne Diseases

Ticks and tick-borne diseases aren’t spread evenly across the country. Some regions have a much higher risk for certain diseases.

Keep in mind that ticks are spreading to new areas (due to climate change, animal host movements, etc.), so previously “low risk” areas can become risky over time. Always stay informed about local tick presence. Many state health departments have good info on what ticks and diseases are common there.

Here’s a quick regional guide:

Northeastern U.S. (New England & Mid-Atlantic)

CT, DC, DE, MA, MD, ME, NH, NJ, NY, PA, RI, and VT

Southeastern & South-Central U.S.

AL, AR, FL, GA, KY, LA, MO, MS, NC, OK, SC, TN, TX, and WV

Upper Midwest U.S.

IA, IL, IN, MI, MN, OH, and WI

Western U.S.

AZ, CA, CO, ID, KS, MT, ND, NE, NM, NV, OR, SD, UT, WA, and WY

(On our site, check out the Tick Species section for maps of where key ticks are found, and remember: just because an area isn’t known for a disease doesn’t mean it’s impossible to get it there – always be tick-savvy!)