Bear attacks on humans are rare. Across North America, black bears kill fewer than one person per year on average, and your odds of being injured by a bear in a place like Yellowstone National Park are roughly 1 in 3.6 million visits for grizzlies and 1 in 23.2 million visits for black bears. That said, attacks are increasing globally, and the details behind the numbers are worth understanding if you spend time outdoors.
How Many Attacks Happen Each Year
Black bears, the most common bear species in North America with a population of about 750,000, have killed 61 people across the continent since 1900. That works out to less than one fatal attack per year over more than a century. Non-fatal attacks are more common but still uncommon in absolute terms. Alaska, which has both black and brown bears in high density, recorded 68 hospitalizations from bear attacks over an 18-year span from 2000 to 2017, alongside 10 fatalities from 8 separate incidents.
Polar bears are responsible for even fewer encounters. Between 1870 and 2014, researchers documented 73 polar bear attacks on humans worldwide, resulting in 20 deaths and 63 injuries across all five countries where polar bears live (Canada, Greenland, Norway, Russia, and the United States). That’s roughly half an attack per year, spread across the entire Arctic.
Are Attacks Increasing Over Time
Yes. A global analysis of brown bear attacks published in Scientific Reports found a significant increase in attacks over recent decades. The primary driver is straightforward: both bear and human populations have grown, creating more overlap in the places where people live, hike, camp, and work. The more people moving through bear country, the more encounters occur. Interestingly, at a global scale, attacks were most frequent in areas with high bear density and low human density, places where people may be less prepared for encounters or where bears are less habituated to human presence.
Why Bears Attack
Most bear attacks are not predatory. A study of non-fatal black bear attacks in the lower 48 states from 2000 to 2017 broke down the motivations: 52% were defensive, meaning the bear felt threatened and reacted to protect itself or its cubs. Another 33% were food-motivated, often involving bears that had learned to associate humans with food sources like trash, bird feeders, or improperly stored camp food. Only 15% were classified as predatory, where a bear actively sought out a person as prey.
This distinction matters practically. Defensive attacks tend to be brief. The bear wants to neutralize a perceived threat and leave. Food-motivated attacks can often be prevented entirely through proper food storage. Predatory attacks, while the rarest type, are the most dangerous because the bear is persistent and won’t be easily deterred.
Where Attacks Are Most and Least Likely
Alaska stands out as the state with the highest concentration of serious bear encounters, which makes sense given its large brown bear population and the amount of backcountry activity that happens there. But even in heavily visited bear habitat, the numbers stay low. Yellowstone National Park, home to both grizzly and black bear populations, has seen its injury rate actually decrease over time even as annual visitation has climbed. Researchers found the risk varies by activity type, with backcountry hikers and hunters facing higher odds than people staying near developed areas.
In 2025, North America recorded four confirmed fatal bear attacks: three from black bears (two in Arkansas and one in Florida) and one from a grizzly in British Columbia. The victims ranged in age from 60 to 89, and the incidents occurred in a mix of settings, from campgrounds to rural properties to hunting trips.
What Happens When Someone Survives
The large majority of people who are seriously injured by bears survive. In Alaska’s 2000 to 2017 data, all 68 hospitalized bear attack patients survived, and 82% were discharged directly to their homes rather than to rehabilitation or long-term care facilities. That suggests most injuries, while serious enough to require hospitalization, were not permanently disabling. The 10 fatalities during that same period were people who died before reaching a hospital or during the attack itself.
Putting the Risk in Perspective
For context, about 20 people die each year in the U.S. from lightning strikes, and roughly 60 die from bee and wasp stings. Fewer than one person per year dies from a black bear attack across all of North America. Your risk on any individual trip into bear country is vanishingly small, especially if you take standard precautions like carrying bear spray, making noise on the trail, storing food properly, and knowing the difference between how to respond to a defensive encounter versus a predatory one.
The overall trend of increasing attacks reflects not that bears are becoming more dangerous, but that more people are spending time in wild places. The bears haven’t changed much. The geography of human recreation has.