Animal Population
States Without Ticks 2025
Brown Dog Tick
Non-native
Present
State | Brown Dog Tick↓ | American Dog Tick | Blacklegged Tick | Lone Star Tick | |
|---|---|---|---|---|---|
 | Alabama | Present | Present | Present | Present |
 | Arizona | Present | |||
 | Arkansas | Present | Present | Present | Present |
 | California | Present | Present | ||
 | Colorado | Present | |||
 | Connecticut | Present | Present | Present | Present |
 | Delaware | Present | Present | Present | Present |
 | District of Columbia | Present | Present | Present | Present |
 | Florida | Present | Present | Present | Present |
 | Georgia | Present | Present | Present | Present |
 | Hawaii | Present | |||
 | Idaho | Present | |||
 | Illinois | Present | Present | Present | Present |
 | Indiana | Present | Present | Present | Present |
 | Iowa | Present | Present | Present | Present |
 | Kansas | Present | Present | Present | Present |
 | Kentucky | Present | Present | Present | Present |
 | Louisiana | Present | Present | Present | Present |
 | Maine | Present | Present | Present | Present |
 | Maryland | Present | Present | Present | Present |
 | Massachusetts | Present | Present | Present | Present |
 | Michigan | Present | Present | Present | |
 | Minnesota | Present | Present | Present | |
 | Mississippi | Present | Present | Present | Present |
 | Missouri | Present | Present | Present | Present |
 | Montana | Present | Present | ||
 | Nebraska | Present | Present | Present | Present |
 | Nevada | Present | |||
 | New Hampshire | Present | Present | Present | Present |
 | New Jersey | Present | Present | Present | Present |
 | New Mexico | Present | |||
 | New York | Present | Present | Present | Present |
 | North Carolina | Present | Present | Present | Present |
 | North Dakota | Present | Present | Present | |
 | Ohio | Present | Present | Present | Present |
 | Oklahoma | Present | Present | Present | Present |
 | Oregon | Present | Present | ||
 | Pennsylvania | Present | Present | Present | Present |
 | Rhode Island | Present | Present | Present | Present |
 | South Carolina | Present | Present | Present | Present |
 | South Dakota | Present | Present | Present | |
 | Tennessee | Present | Present | Present | Present |
 | Texas | Present | Present | Present | Present |
 | Utah | Present | |||
 | Vermont | Present | Present | Present | |
 | Virginia | Present | Present | Present | Present |
 | Washington | Present | |||
 | West Virginia | Present | Present | Present | Present |
 | Wisconsin | Present | Present | Present | |
 | Wyoming | Present | Present | ||
 | Alaska | Non-native | Non-native |
- Ticks exist in every state in the US, though they are less common and diverse in the northern states and cooler climates.
- Data focus upon ticks that can transmit diseases to humans. Tick species that do not transmit diseases to humans are excluded.
- Alaska is the only US state with zero native tick species that can carry disease to humans (though it does have at least one native species, Ixodes angustus, which is common on hares and squirrels). However, several species can survive and even overwinter there if introduced on animals (typically dogs) from out of state.
