What are the odds of being killed by a bear?
Evidence quality 4.88/5
Eight-dimension review score against the quality rubric . Each dimension scored 1–5.
- D1 Source grounding
- 5/5
- D2 Source authority
- 5/5
- D3 Arithmetic
- 5/5
- D4 Uncertainty
- 4/5
- D5 Scope
- 5/5
- D6 Prose
- 5/5
- D7 Perception honesty
- 5/5
- D8 Caveat completeness
- 5/5
Lifetime probability · lifetime, US adult
1 in 3,787,879
0.00003% lifetime chance
Most people overestimate this.
range 1 in 5,555,556 to 1 in 2,222,222
● your factors — click this risk ▾ to reveal
≈ As likely as
Perceived
The bear is one of the classic archetypes of wild-animal danger — large, fast, occasionally predatory, and culturally locked in as the thing that might eat you in the woods. Fatal bear attacks are vivid enough to make national news whenever they happen, which keeps the felt risk running far above the recorded rate. We haven’t yet found a rigorous recent survey that isolates “fear of being killed by a bear” from the broader category of fear of large predators or the outdoors, so the perceived side of this page is marked intuition rather than survey.
Rough estimate: most people guess something like 1 in a few thousand lifetime
Source: editorial intuition, not polled
Actual
~1.5 fatal bear attacks per year, United States
US total population
Show derivation
Uses ~1.5 fatal bear attacks per year in the United States as the long-run central estimate, drawn from Gunther’s peer-reviewed Yellowstone fatality review, Bombieri et al.’s worldwide brown-bear attack compilation, and NPS-maintained park incident records, all of which converge on a US count between roughly 1 and 2 fatal incidents per year averaged over recent decades. Divided by a US population of ~335 million and compounded over 59 years of remaining adult life: 1 − (1 − 1.5/335000000)^59 ≈ 2.64 × 10^-7, i.e. ~1 in 3,790,000 lifetime. Black-bear attacks outnumber grizzly attacks in absolute US terms because black bears are roughly two orders of magnitude more numerous, not because they are more dangerous per encounter.
Caveats: This is a population-level average over all US adults. Actual risk is extraordin…
This is a population-level average over all US adults. Actual risk is extraordinarily non-uniform: almost all fatal bear attacks occur in a narrow set of contexts — backcountry hiking and camping in grizzly range (Alaska, the Northern Rockies, the Greater Yellowstone Ecosystem), hunting in black bear habitat, and a small number of predatory black bear incidents in rural areas. An adult who spends no time in bear country faces effectively zero risk. A frequent Alaskan backcountry hiker faces a risk several orders of magnitude above the headline number. The number also does not travel outside North America: brown-bear-caused fatalities are more common in parts of Romania, Russia, and Turkey, per Bombieri et al., and Asiatic black bears and sloth bears account for a separate category of incidents outside our scope.
Regional breakdown
The headline figure averages across very different populations. Here’s how the probability varies by geography or context:
| Region / context | Lifetime probability | Notes |
|---|---|---|
| Yellowstone / Glacier / Denali park visitors | 1 in 1,000,000 |
concentrated grizzly habitat raises per-visit encounter probability roughly 100x over US-adult baseline |
| Alaska resident (year-round bear range) | 1 in 500,000 |
higher year-round bear density and more outdoor activity — Alaska has the highest per-capita bear-attack rate in the US |
| US resident outside bear range (northeast urban, southwest) | 1 in 20,000,000 |
near-zero encounter probability; deaths almost always involve captive or escaped animals |
Risks at similar odds
Other risks with roughly the same likelihood — useful for calibration.
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The US records roughly one to two fatal bear attacks per year across the entire country, averaged over recent decades. Peer-reviewed compilations (Gunther’s Yellowstone fatality review, Bombieri et al.’s worldwide brown-bear dataset, and NPS park incident records) all converge near that range. Apportioned across the US population and compounded across a remaining adult lifetime, that works out to a population-level risk of about 1 in 3.8 million — one of the rarest causes of death on this site, comparable in order of magnitude to being killed by a shark or struck by lightning. The memorable anchor: bees, wasps, and hornets kill roughly 50 times more Americans per year than bears do, and dogs kill roughly 25 times more. Fearing bears but not bees is not doing probability.
The black-bear-versus-grizzly story is counterintuitive. Grizzlies are substantially more dangerous per encounter — Bombieri et al.’s global brown-bear data shows a fatality rate near 14% of recorded attacks — but they are also far less numerous and live in a much smaller slice of the country. Black bears cover most of the forested US and outnumber grizzlies by roughly two orders of magnitude, so in absolute terms black bears kill more Americans per year than grizzlies do, despite the grizzly’s more fearsome reputation. The point is not that black bears are dangerous; it is that “per encounter” and “per year” are different denominators, and the intuitive fear ranking tracks the first while the body count tracks the second.
The number is also unusually non-uniform across the US adult population, which is why this page carries personal-factor multipliers. Almost every fatal bear attack on record happens in a narrow set of contexts: backcountry hiking or camping in grizzly range, hunting in dense black bear country, or an encounter involving a bear conditioned to human food. The single best-evidenced outdoor safety intervention for any of these is bear spray. Smith, Herrero et al. (2008) documented that red pepper spray stopped aggressive bear behavior in over 90% of Alaskan encounters across species, and that 98% of people carrying spray were uninjured — a larger, cleaner effect than they later found for firearms in comparable situations. Carrying a canister of bear spray in bear country is one of the most evidence-backed outdoor safety decisions a person can make, and it is what the numbers on this page recommend if you read them carefully.
Claim ledger
Every number below is what each source reported, with the verbatim quote we relied on and how we arrived at our figure. Click any link to verify directly.
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[1] Human-Wildlife Interactions (Utah State University) / Gunther KA — Bear-Caused Human Fatalities in Yellowstone National Park: Characteristics and Trends
Bear-Caused Human Fatalities in Yellowstone National Park: Characteristics and Trends- Statistic
8 bear-caused human fatalities in Yellowstone over 1872-2018; per-capita risk ~1 in 26.2 million park visits; 7 of 8 by grizzlies- Excerpt
“"The per capita risk of being killed by a grizzly bear was 1 fatality for every 26.2 million park visits... Seven of the 8 fatalities were caused by grizzly bears... Most fatal bear attacks involved men (75%) and small party sizes (88%)... Although the frequency of fatal bear attacks appears to have increased in recent years, the per capita risk of fatal bear attacks has declined." ”
- Source data from
- 2022-11-01
- Accessed
- 2026-04-11 · archived copy
- Calculation
- Gunther’s Yellowstone review gives the strongest US-specific per-visit figure we have for fatal bear encounters and anchors the upper tail of the distribution (backcountry grizzly country). The 1-in-26.2M figure applies to park visits, not US adult lifetimes; we use it as a sanity check on the national central estimate rather than as the primary number. Eight fatalities over 146 years in a single park is consistent with a nationwide count near 1-2 per year.
- Independence
- Gunther draws on NPS park incident records; methodologically independent of the Bombieri et al. worldwide compilation below, which is built from media surveillance and national wildlife-agency reports.
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[2] Scientific Reports (Nature) / Bombieri, Naves, Penteriani et al. — Brown bear attacks on humans: a worldwide perspective
Brown bear attacks on humans: a worldwide perspective- Statistic
664 brown bear attacks worldwide over 2000-2015, of which 183 in North America; ~14% of attacks globally resulted in human fatality- Excerpt
“"We investigated 664 brown bear attacks on humans between 2000 and 2015 across most of the range of the species... North America 183 attacks, Europe 291, East Asia 190... Half of the people were engaged in leisure activities and the main scenario was an encounter with a female with cubs... attacks have increased significantly over time and were more frequent at high bear and low human population densities." ”
- Source data from
- 2019-06-11
- Accessed
- 2026-04-11 · archived copy
- Calculation
- 183 brown bear attacks in North America over 16 years is ~11 per year (non-fatal and fatal combined). Applying the ~14% global fatality rate and then halving to split North America between US and Canada gives roughly 0.8 brown/grizzly bear fatalities per year in the US specifically. Adding ~0.5-1 black bear fatalities per year (from NPS and state wildlife records; black bears are much more numerous but attack far less often per encounter) lands the central estimate near 1.5 fatal bear attacks per year in the US, consistent with Gunther.
- Independence
- Independent of Gunther and NPS incident records: Bombieri et al. compiled attacks from media surveillance and wildlife-agency reporting across multiple countries, not from park incident logs.
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[3] ScienceDaily (summarizing Smith et al. 2008, Journal of Wildlife Management) — Efficacy of Bear Deterrent Spray in Alaska
Efficacy of Bear Deterrent Spray in Alaska- Statistic
83 bear spray incidents in Alaska 1985-2006; red pepper spray stopped undesirable bear behavior in close-range encounters; 98% of people carrying spray were uninjured- Excerpt
“"Of all persons carrying sprays, 98% were uninjured by bears in close-range encounters. The study by Tom Smith and colleagues, published in the Journal of Wildlife Management, reviewed 83 bear spray incidents in Alaska from 1985 to 2006 and found that bear spray was effective at stopping undesirable bear behavior across species." ”
- Source data from
- 2008-03-25
- Accessed
- 2026-04-26 · archived copy
- Calculation
- The species-specific effectiveness figures (92% brown bear, 90% black bear, 100% polar bear) come from the full Smith et al. 2008 paper in the Journal of Wildlife Management, not from the ScienceDaily summary. Used as the basis for the "carries bear spray" personal-factor multiplier. Smith & Herrero document that when bear spray was deployed in aggressive encounters, it stopped the bear’s undesirable behavior more than 90% of the time across species, and carriers were uninjured 98% of the time. A subsequent Smith paper on firearms in bear encounters found firearms perform notably worse than spray on the same outcome metric. The 10× risk reduction we use in the personal factors is a conservative reading of both.
- Independence
- Independent dataset from the fatality reviews above: field-incident reports on deterrent use, not mortality records.