2024’s Worst States for Tick-Borne Illnesses

A group of hikers walk past a sign reading “Beware of Ticks!” in the forest

Where should hikers, parents, and pet lovers be on the lookout for ticks?

To mark May as National Lyme Disease Awareness Month, Pest Gnome ranked 2024’s Worst States for Tick-Borne Illnesses.

We compared the 50 states based on 6 categories. We looked at annual rates of tick-borne diseases like Lyme disease, ehrlichiosis, and Rocky Mountain spotted fever (RMSF). We also considered environmental factors like forest area, hiking trails, and length of tick and flea season, among 25 total metrics.

Enjoy nature safety with help from our ranking below. To learn how we ranked the states, see our methodology.

Contents

State Rankings

See how each state fared in our ranking:

Top 5 Close Up

Check out the slideshow below for highlights on each of our 5 most at-risk states for tick-borne illnesses.

A sign welcoming visitors to Wisconsin
No. 5: Wisconsin | Overall Score: 40.96

Total Lyme Disease Cases (Most Recent Year): 5,208 | Rank: 4
Lyme Disease Annual Rates: 88.6 | Rank: 5
Tick-Borne Pathogen Distribution: 83 | Rank: 6
Forest Areas: 6,390 kilohectares (kha) | Rank: 12
Blacklegged Tick and Western Blacklegged Tick Distribution: 119 | Rank: 11

Local tips: 
Everything to Know About Termites in Wisconsin

Photo Credit: Mark / Adobe Stock / License
Hikers looking at Lake Ausable at Indian head trail and Rainbow waterfalls near Keene in New York State.
No. 1: New York | Overall Score: 54.33

Total Lyme Disease Cases (Most Recent Year): 16,798 | Rank: 1
Lyme Disease Annual Rates: 84.6 | Rank: 6
Tick-Borne Pathogen Distribution: 225 | Rank: 2
Number of Hiking Trails: 3,689 | Rank: 3
Blacklegged Tick and Western Blacklegged Tick Distribution: 124 | Rank: 8

Local tips: 
Everything to Know About Termites in New York
What to Do About Rats in New York City
Everything to Know About Bed Bugs in New York City

Photo Credit: Thomas / Adobe Stock / License
A sign welcoming visitors to Pennsylvania
No. 2: Pennsylvania | Overall Score: 46.21

Total Lyme Disease Cases (Most Recent Year): 8,413 | Rank: 2
Lyme Disease Annual Rates: 64.7 | Rank: 9
Tick-Borne Pathogen Distribution: 263 | Rank: 1
Forest Areas: 7,430 kilohectares (kha) | Rank: 6
Blacklegged Tick and Western Blacklegged Tick Distribution: 134 | Rank: 5

Local tips: 
Everything to Know About Termites in Pennsylvania

Photo Credit: andreykr / Adobe Stock / License
A field of Texas bluebonnets with the sun setting in the distance
No. 3: Texas | Overall Score: 42.93

Total Lyme Disease Cases (Most Recent Year): 23 | Rank: 30
Forest Areas: 7,260 kilohectares (kha) | Rank: 8
Number of Farms: 230,662 | Rank: 1
Blacklegged Tick and Western Blacklegged Tick Distribution: 97 | Rank: 17
Number of Months in Tick and Flea Season: 12 | Rank: 1 (tie)

Local tips: 
Everything to Know About Bed Bugs in Texas
Everything to Know About Termites in Texas
When is Mosquito Season in Texas?
How to Get Rid of Mosquitoes in Texas

Photo Credit: kanonsky / Adobe Stock / License
Hiking trail going through redwood forest of Muir Woods National Monument, North San Francisco bay
No. 4: California | Overall Score: 41.69

Total Lyme Disease Cases (Most Recent Year): 77 | Rank: 23
Tick-Borne Pathogen Distribution: 48 | Rank: 9
Forest Areas: 10,800 kilohectares (kha) | Rank: 2
Number of Hiking Trails: 10,748 | Rank: 1
Number of Months in Tick and Flea Season: 12 | Rank: 1 (tie)

Local tips: 
Bed Bugs in California: Everything You Need to Know
Everything to Know About Termites in California
When is Mosquito Season in California?

Photo Credit: Sundry Photography / Adobe Stock / License
A sign welcoming visitors to Wisconsin
No. 5: Wisconsin | Overall Score: 40.96

Total Lyme Disease Cases (Most Recent Year): 5,208 | Rank: 4
Lyme Disease Annual Rates: 88.6 | Rank: 5
Tick-Borne Pathogen Distribution: 83 | Rank: 6
Forest Areas: 6,390 kilohectares (kha) | Rank: 12
Blacklegged Tick and Western Blacklegged Tick Distribution: 119 | Rank: 11

Local tips: 
Everything to Know About Termites in Wisconsin

Photo Credit: Mark / Adobe Stock / License
Hikers looking at Lake Ausable at Indian head trail and Rainbow waterfalls near Keene in New York State.
No. 1: New York | Overall Score: 54.33

Total Lyme Disease Cases (Most Recent Year): 16,798 | Rank: 1
Lyme Disease Annual Rates: 84.6 | Rank: 6
Tick-Borne Pathogen Distribution: 225 | Rank: 2
Number of Hiking Trails: 3,689 | Rank: 3
Blacklegged Tick and Western Blacklegged Tick Distribution: 124 | Rank: 8

Local tips: 
Everything to Know About Termites in New York
What to Do About Rats in New York City
Everything to Know About Bed Bugs in New York City

Photo Credit: Thomas / Adobe Stock / License

The Upshot

Keep your socks pulled up over your pant legs when outdoors in the Northeast. Lyme disease is most prevalent in states like New York (No. 1), Pennsylvania (No. 2), and New Jersey (No. 30). New York recorded the highest number of Lyme disease cases in 2022, with around 16,800. Rhode Island (No. 11) claimed the highest rate of Lyme disease cases, 212 per 100,000 residents annually.

12 states tied with the longest tick and flea season, 12 months, including Texas (No. 3), California (No. 4), and Washington (No. 17). While Texas reported lower instances of Lyme disease, it tied with Oklahoma (No. 29) for having the most diverse tick species — including American Dog, Gulf Coast, and Lone Star ticks, which can cause other illnesses like Ehrlichiosis, Southern tick-associated rash illness (STARI), and alpha-gal syndrome.

Utah (No. 48) and Arizona (No. 49) landed toward the bottom alongside Hawaii in last place. Only blacklegged and western blacklegged ticks (aka deer ticks) carry Lyme disease, and none are found in Hawaii or 6 other states — such as Idaho (No. 47) and Alaska (No. 40).

Ask The Experts

A National Pest Management Association survey shows that 25% of Americans are worried about being bitten by ticks and the risk of contracting tick-borne diseases.

Don’t bug out if you find a tick on your clothes or skin after a stroll through the park. We turned to a panel of experts to learn more about ticks and how to prevent and deal with tick bites. Stay informed and prepared with help from their insights below.

  1. What are three misconceptions about ticks?
  2. What are three of the best ways to prevent tick bites?
  3. What are your best three tips for protecting pets and kids from tick bites?
  4. What should you do if you are bitten by a tick?
  5. What should you do if your pet is bitten by a tick?
  6. What three common locations are most notorious for harboring ticks?
Becky Smith
Becky Smith
Associate Professor of Epidemiology, Health Innovation Professor
Megan Linske
Megan A. Linske, Ph.D., Certified Ecologist
Past President, The Wildlife Society, Northeast Section Assistant Scientist II
Sam Telford
Sam Telford
Professor of Infectious Disease and Global Health

Behind the Ranking

First, we determined the factors (metrics) that are most relevant to rank the Worst States for Tick-Borne Illnesses. We then assigned a weight to each factor based on its importance and grouped those factors into 6 categories: Infestation Risk, Environmental Factors, Tick Distribution, Climate, Agricultural Factors, and Pest Control. The categories, factors, and their weights are listed in the table below.

For each of the 50 states, we then gathered data on each factor from the sources listed below the table.

Finally, we calculated scores (out of 100 points) for each state to determine its rank in each factor, each category, and overall. A state’s Overall Score is the average of its scores across all factors and categories. The highest Overall Score ranked “Best” (No. 1) and the lowest “Worst” (No. 50).

  • The “Worst” among individual factors may not be No. 50 due to ties.
  • Data for “Total Lyme Disease Cases” was collected from the most recent year available, 2022. 
  • “Tick-Borne Pathogen Distribution” includes the recorded presence of pathogens in blacklegged and western blacklegged ticks, including:
    • Borrelia burgdorferi sensu stricto
    • Borrelia mayonii
    • Borrelia miyamotoi
    • Anaplasma phagocytophilum human active variant
    • Ehrlichia muris eauclairensis
    • Babesia microti
    • Powassan virus
  • Incidence rates calculated by the source were adjusted per 100,000 residents. 

Sources: AllTrails, American Kennel Club, Centers for Disease Control and Prevention, Farmland Information Center, Federal Transit Administration, Global Forest Watch, Google Ads, IBISWorld, National Oceanic and Atmospheric Administration, PlaygroundEquipment.com, TerraGalleria.com, U.S. Census Bureau, and U.S. Department of Agriculture

Final Thoughts

While ticks can transmit at least 17 distinct diseases to humans, over 80% of diagnosed tick-borne illnesses in the U.S. can be attributed to Lyme disease. 

In 2022, local health departments reported over 63,000 cases of Lyme disease to the CDC. However, experts estimate nearly 476,000 people in the U.S. are diagnosed with or treated for Lyme disease annually. According to the most recent CDC data, this would mean more cases of Lyme disease than colon cancer (126,240) and breast cancer (239,612) combined.

Lyme disease can be life-changing — read about our editor Sharon Sullivan’s personal experience, including obstacles to diagnosis and treatment. Lyme, ehrlichiosis, and RMSF are some of the most well-known tick-borne diseases. Other illnesses impacting humans include:

New tick-preventive medication could soon help humans avoid Lyme disease and other tick-borne illnesses. 

Until then, you must act quickly to prevent disease transmission from a tick bite. Know how to identify and remove ticks, and keep an eye out for signs and symptoms like the bulls-eye rash indicating Lyme disease. 

Don’t forget to protect your pets from these parasites, too. Dogs can contract tick-borne illnesses like Lyme disease, canine ehrlichiosis, and hepatozoonosis. Talk with your vet about preventative tick treatments, use tick-resistant landscaping strategies, and be sure to give your pup a thorough check after romping through the woods. 

Ticks love to hitch rides on other critters, like mice and chipmunks, which can transmit pathogens to the ticks. 

Hire a Pest Gnome pro to handle all your pest control needs, including repelling and exterminating ticks and their pesky rodent chauffeurs. 

What is Pest Gnome? 

Pest Gnome — part of the Home Gnome family of home service sites — puts local pest control experts at your fingertips. Pest Gnome is part of the Home Gnome family of home services sites.

Media Resources

  • Lyme disease was first identified in Connecticut (No. 39) in 1975. Connecticut lands near the top of Infestation Risk, meaning there is still a high risk of contracting Lyme disease as well as ehrlichiosis. However, the state lacks rural environments and has a lower distribution of blacklegged and western blacklegged ticks. The state recently received $239,000 in federal funding for tick prevention and research.
  • Known for its hiking and camping scene, California (No. 4) nature lovers enjoy abundant forests and tree cover, and the most hiking trails out of the remaining states, with over 10,700. Unfortunately, locals have been reporting rampant tick sightings in recent weeks following a rainy spring season. 
  • Arkansas (No. 16) reported the highest annual incidence rate of ehrlichiosis and Rocky Mountain spotted fever
  • Virginia (No. 12) and Indiana (No. 27) tied for the highest distribution of blacklegged and western blacklegged ticks which can potentially carry Lyme disease and Powassan virus. 

Main Photo Credit: Heiko Barth / Adobe Stock / License

Editorial Contributors

  • Sav Maive

    Sav Maive

    Author

    Sav Maive is a writer and director based in San Antonio. Sav is a graduate of the University of Virginia and is a loving cat and plant mom.

    Learn more
  • Sharon Sullivan

    Sharon Sullivan

    Editor

    Sharon Sullivan, senior managing editor at Pest Gnome, dreads love bugs in Central Florida and recently battled squirrels that ate the wiring of her car, resulting in a shockingly expensive repair bill.

    Learn more