Guide Rankings Nature Updated June 20, 2026

Deadliest Animals by State

Western diamondback rattlesnake coiled in desert scrub, the most dangerous wildlife threat in Texas, Arizona, and New Mexico

Deadliest Animals by State

Ranking - Nature

The western diamondback rattlesnake is the deadliest animal in three states and accounts for approximately 450 incidents per year in Texas alone.

Quick Answer

Deadliest Animals by State

  1. 1

    Venomous snakes are the top threat in 36 of 50 states. Texas leads all states with 400–500 western diamondback rattlesnake bite incidents per year, the highest count of any state.

  2. 2

    Alaska, Montana, and Wyoming are the only three states where the grizzly bear ranks as the primary threat, at 4–8 attacks per year in Alaska and 3–7 in Montana and Wyoming. Mountain lions lead in California (5–10) and Colorado (4–8).

  3. 3

    Florida leads all states for alligator attacks with 25–35 incidents per year, more than double Louisiana's 10–15. Hawaii is the only state where a marine animal ranks first, with tiger shark attacks averaging 5–8 per year.

Map

Deadliest Animal in Each U.S. State Map

incidents/year
No data
Snakes (yellow) dominate 36 states; bears and mountain lions (orange) lead in 8; alligators and crocodilians (green) in 3; sharks and moose cover Hawaii and Maine. Texas (450 incidents) stands apart from all other states.
Deadliest Animal in Each U.S. State Map
Rank State incidents/year
1 Texas 450
2 Arizona 175
3 New Mexico 62
4 Arkansas 50
5 North Carolina 45
6 Tennessee 45
7 Oklahoma 42
8 Virginia 35
9 Kentucky 35
10 Florida 30
11 Missouri 30
12 Nevada 25
13 Georgia 25
14 Idaho 20
15 Utah 20
16 Mississippi 17
17 South Carolina 17
18 Oregon 15
19 Washington 15
20 Illinois 12
21 Indiana 12
22 Kansas 12
23 Louisiana 12
24 Maryland 12
25 Nebraska 10
26 Pennsylvania 10
27 South Dakota 10
28 West Virginia 10
29 Alabama 7
30 California 7
31 Alaska 6
32 Colorado 6
33 Delaware 6
34 Hawaii 6
35 Maine 6
36 Michigan 6
37 Minnesota 6
38 New York 6
39 North Dakota 6
40 Ohio 6
41 Wisconsin 6
42 Wyoming 5
43 Iowa 4
44 Montana 4
45 New Hampshire 4
46 New Jersey 4
47 Connecticut 3
48 Massachusetts 3
49 Rhode Island 3
50 Vermont 3

Snakes (yellow) dominate 36 states; bears and mountain lions (orange) lead in 8; alligators and crocodilians (green) in 3; sharks and moose cover Hawaii and Maine. Texas (450 incidents) stands apart from all other states.

Deadliest Animals by State Table

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Print-ready table — Deadliest Animals by State

States With the Most Annual Wildlife Incidents

Highest

450
Texas flag
Texas #1

Top 10 — annual_incidents_est

#1 Texas flag Texas
450
#2 Arizona flag Arizona
175
#3 New Mexico flag New Mexico
62
#4 Arkansas flag Arkansas
50
#5 North Carolina flag North Carolina
45
#6 Tennessee flag Tennessee
45
#7 Oklahoma flag Oklahoma
42
#8 Virginia flag Virginia
35
#9 Kentucky flag Kentucky
35
#10 Florida flag Florida
30

Bears, Mountain Lions, Alligators, and Sharks: High-Lethality States

American alligators swimming in murky swamp water with only their heads and backs visible
Florida leads alligator-incident states with 25 to 35 attacks per year, well ahead of Louisiana and Alabama. In the Southeast, waterways, canals, and retention ponds put people in regular contact with large crocodilians.

Florida leads all states for alligator incidents at 25–35 per year — more than double Louisiana's 10–15 and three to five times Alabama's 5–10. All three alligator states are rated High danger level despite lower incident counts than the top snake states.

Alaska (4–8), Wyoming (4–7), and Montana (3–6) are the only states where a grizzly bear ranks first. California (5–10) and Colorado (4–8) lead for mountain lion incidents. Hawaii's tiger shark (5–8) and Maine's moose (5–8) are the only marine and ungulate entries on the list.

Florida — American Alligator

Florida — American Alligator

25–35 incidents per year · Danger: High. Florida leads all states for alligator encounters with statewide presence in lakes, rivers, canals, and retention ponds.

Louisiana — American Alligator

Louisiana — American Alligator

10–15 incidents per year · Danger: High. Louisiana ranks second for alligator incidents, with large populations in the Atchafalaya Basin, coastal marshes, and bayous.

Alabama — American Alligator

Alabama — American Alligator

5–10 incidents per year · Danger: High. Alabama's Mobile-Tensaw Delta and coastal waterways support a growing alligator population that regularly intersects with people.

California — Mountain Lion

California — Mountain Lion

5–10 incidents per year · Danger: High. California has the largest mountain lion population in the contiguous U.S., with encounters concentrated in foothill communities near wildland edges.

Colorado — Mountain Lion

Colorado — Mountain Lion

4–8 incidents per year · Danger: High. Colorado ranks second for mountain lion incidents, with Front Range suburban-wildland interfaces seeing the most human encounters.

Alaska — Brown Bear (Grizzly)

Alaska — Brown Bear (Grizzly)

4–8 incidents per year · Danger: High. Alaska has the highest grizzly bear density of any U.S. state, with encounters common on salmon streams and in remote backcountry.

Wyoming — Grizzly Bear

Wyoming — Grizzly Bear

4–7 incidents per year · Danger: High. The Yellowstone ecosystem supports more than 700 grizzly bears, with most incidents near backcountry trails and campgrounds.

Montana — Grizzly Bear

Montana — Grizzly Bear

3–6 incidents per year · Danger: High. Glacier National Park and the Bob Marshall Wilderness account for the majority of grizzly encounters in Montana.

Hawaii — Tiger Shark

Hawaii — Tiger Shark

5–8 incidents per year · Danger: High. Hawaii is the only state where a marine animal ranks first. Tiger sharks frequent nearshore waters around Maui and Oahu year-round.

Maine — Moose

Maine — Moose

5–8 incidents per year · Danger: High. Maine's moose incidents are almost entirely vehicle collisions on rural highways at night. At 1,000+ lbs, a moose strike is often fatal.

Venomous Snakes: The Top Threat in 36 States

Timber rattlesnake coiled on leaf litter in a forest habitat
Venomous snakes dominate this ranking because they are widespread, medically significant, and regularly encountered near trails, rural homes, and rocky habitat. Timber rattlesnakes alone rank first in ten Northeastern, Midwestern, and Appalachian states.

Venomous snakes rank as the primary wildlife threat in 36 of 50 states. Copperheads account for 14 of those states, concentrated in the East and South. The western diamondback rattlesnake leads in Texas (#1, 400–500), Arizona (#2, 150–200), and New Mexico (#3, 50–75). Timber rattlesnakes are the top threat in 10 states across the Northeast, Midwest, and Appalachians.

Prairie rattlesnakes lead in Kansas, Nebraska, South Dakota, and North Dakota across the Great Plains. The cottonmouth ranks first in Mississippi (15–20 incidents) and the Mojave rattlesnake in Nevada (20–30). The great basin rattlesnake tops Utah (15–25) and the eastern diamondback leads Georgia (20–30) and South Carolina (15–20).

Quick Answers

What is the deadliest animal in Texas?
The western diamondback rattlesnake, with 400–500 reported bite incidents per year — the highest incident count of any state-animal combination in the U.S. Texas accounts for more venomous snakebite incidents than any other state.
What is the most dangerous animal in Florida?
The American alligator, with 25–35 unprovoked attack incidents per year. Florida ranks 10th overall by incident count but first among all states for alligator encounters. Louisiana (10–15) and Alabama (5–10) are the next two alligator-dominant states.
What is the deadliest animal in Alaska?
The brown bear (grizzly bear), with 4–8 attack incidents per year. Alaska, Montana (3–6), and Wyoming (4–7) are the only three states where the grizzly bear ranks as the primary wildlife threat.
What is the most dangerous animal in Hawaii?
The tiger shark, with 5–8 attack incidents per year. Hawaii is the only state where a marine animal ranks as the primary wildlife threat. The state has no large land predators, making ocean-going species the dominant risk.
Which states have the most venomous snakebite incidents per year?
Texas leads with 400–500 western diamondback incidents per year. Arizona ranks second at 150–200. New Mexico (50–75), Arkansas (40–60), North Carolina (40–50), Tennessee (40–50), and Oklahoma (35–50) follow in the next tier.
What is the deadliest animal in California?
The mountain lion, with 5–10 reported attack incidents per year. California and Colorado (4–8) are the top two mountain lion states in the contiguous U.S. Both rate High on the danger scale.

Methodology

Each state shows the wild animal species with the most annual reported incidents (bites, attacks, stings) requiring medical attention, based on CDC WISQARS injury records and state wildlife agency data; all figures are approximate annual averages.

Sources

Information is cross-referenced with official state archives.
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