A 2026 report from World Population Review has identified the animals most likely to kill people in each U.S. state, highlighting a mix of venomous snakes, large mammals, and marine predators. The findings, released by a demographic data platform, categorize threats by region, with snakes representing the largest category nationwide.
Snakes dominate as the primary threat in most states, with rattlesnakes accounting for the highest number of fatalities in multiple regions. Moose and other large mammals also rank as top hazards in several northern states, while coastal states face risks from marine predators.
The report ranks specific species as the deadliest in each state, providing a state-by-state breakdown of the most dangerous animals. While snakes—particularly rattlesnakes—are the most frequently cited threat, other animals such as moose, sharks, and venomous insects also pose significant risks depending on the region.
Rattlesnakes lead the list in 14 states, including Connecticut, Kansas, and Oklahoma, where the western pygmy rattlesnake is the primary concern. Other states with rattlesnake threats include North Dakota (prairie rattlesnake), Nevada (Mojave rattlesnake), and Michigan (eastern massasauga). In California, the southern Pacific rattlesnake is identified as the deadliest snake, while Arizona’s top threat is the western diamondback rattlesnake.
Beyond rattlesnakes, several states face risks from other venomous species. Louisiana’s deadliest animal is the eastern diamondback rattlesnake, Mississippi’s is the cottonmouth snake, and Indiana and South Carolina list the eastern and southern copperheads, respectively. Hawaii’s primary concern is the yellow-bellied sea snake.
Large mammals also rank as top threats in multiple states, particularly in northern regions. Moose are cited as the deadliest animals in Colorado, Maine, New Hampshire, and Vermont, reflecting the risks posed by their size and unpredictable behavior. Bears, though not the top threat in any state, are noted as significant hazards in Alaska and Montana.
Marine predators and insects round out the list of top threats. Tiger sharks are identified as the deadliest animal in Florida, while Hawaii also highlights the risks of the yellow-bellied sea snake. Inland states face dangers from venomous insects, with wasps ranking highest in Iowa, ticks in Missouri, mosquitoes in New York, and black widow spiders in Alabama and Nebraska.
The report does not provide specific fatality data but instead ranks animals based on their likelihood to cause fatal encounters. Experts caution that the findings are based on reported incidents and may not account for all potential risks. Officials recommend that residents familiarize themselves with local wildlife threats and take appropriate precautions, such as avoiding areas known for venomous snakes or maintaining safe distances from large mammals.