What are the odds of being killed by a shark?
Evidence quality 4.13/5
Eight-dimension review score against the quality rubric . Each dimension scored 1–5.
- D1 Source grounding
- 4/5
- D2 Source authority
- 4/5
- D3 Arithmetic
- 5/5
- D4 Uncertainty
- 4/5
- D5 Scope
- 4/5
- D6 Prose
- 4/5
- D7 Perception honesty
- 5/5
- D8 Caveat completeness
- 3/5
Lifetime probability · lifetime, US adult
1 in 5,681,818
0.00002% lifetime chance
Most people overestimate this.
range 1 in 11,111,111 to 1 in 2,000,000
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≈ As likely as
Perceived
Shark attacks are a cultural archetype for catastrophic risk — a single vivid film, reinforced by occasional summer headlines, keeps "eaten by a shark" near the top of many people's fear lists despite being one of the rarest causes of death on Earth.
Rough estimate: 34.6% of US adults report being afraid or very afraid of sharks (Chapman Survey 2024)
Actual
~1 unprovoked shark attack fatality per year, United States (of ~8 worldwide)
US total population
Show derivation
The International Shark Attack File reports a 5-year average (2020-2024) of 8 unprovoked fatal shark attacks per year worldwide, with the United States accounting for approximately one of those fatalities in a typical year. The native rate uses the US-specific subset (~1 death/year among ~335 million US residents) since the normalized figure is a US adult lifetime risk. Annual rate: 1/335,000,000 ≈ 2.99 × 10⁻⁹. Compounded over 59 years of remaining adult life: 1 − (1 − 2.99 × 10⁻⁹)⁵⁹ ≈ 1.76 × 10⁻⁷, i.e. roughly 1 in 5,700,000. The uncertainty band reflects years with zero US deaths (low) and occasional years with 2-3 (high).
Caveats: This is a population-level figure over the entire US adult population. Your actu…
This is a population-level figure over the entire US adult population. Your actual risk is essentially zero unless you spend meaningful time in waters known for large apex shark species; surfers in certain regions face higher per-hour exposure but still tiny absolute lifetime numbers.
Risks at similar odds
Other risks with roughly the same likelihood — useful for calibration.
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The shark is one of the most overrepresented causes of death in human imagination. The International Shark Attack File, which has tracked global unprovoked shark attacks since 1958, reports a five-year average (2020-2024) of around eight fatal attacks per year worldwide — spread across the entire ocean-going human population.
Your lifetime risk as a US adult is roughly 1 in 5.7 million, based on the ISAF’s observation that the US typically accounts for about one of those annual deaths. For comparison, the same rough methodology puts your lifetime odds of dying from a bee, wasp, or hornet sting at around 1 in 18,000 — so a person is roughly 240× more likely to be killed by an insect most people dismiss than by the shark most people fear.
The perceived-risk side of this page is marked intuition, not survey. We haven’t yet found a rigorous recent survey that isolates “fear of being killed by a shark” from the broader category of fear of deep water or ocean animals, so we’re honest about that limit. If you know of one, please suggest a fix.
Related tidbits
A US adult is roughly 41,000× more likely to die in a car crash than from a shark attack (~1 in 105 vs ~1 in 4,300,000). Vending machines outpace sharks by roughly the same order of magnitude.
Choking kills roughly 1 in 625 Americans per year. Shark attacks kill ~5 worldwide. Your dinner table is thousands of times more lethal than the ocean. No one makes horror films about hot dogs.
About 80% of adults will experience significant back pain in their lifetime. Fatal shark attacks affect roughly 1 in 4,300,000. One makes headlines; the other makes people miss work.
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] Florida Museum of Natural History, University of Florida — International Shark Attack File — Yearly Worldwide Summary
International Shark Attack File — Yearly Worldwide Summary- Statistic
5-year average (2020-2024) of 8 unprovoked fatal shark attacks per year worldwide; 2025 saw 9 fatalities from 65 unprovoked bites- Excerpt
“"This number is also in line with the most recent five-year annual global average of eight unprovoked fatalities per year. [...] The 2025 worldwide total of 65 confirmed unprovoked cases is in line with the most recent five-year (2020-2024) average of 61 incidents annually." ”
- Source data from
- 2026-01-01
- Accessed
- 2026-04-11 · archived copy
- Calculation
- ISAF reports a 5-year average (2020-2024) of ~8 unprovoked fatal attacks per year worldwide, with the US accounting for ~1 in a typical year. The US-specific annual rate (~1/335M) is compounded over 59 years for normalized lifetime risk: 1 − (1 − 2.99e-9)^59 ≈ 1.76e-7.
- Independence
- ISAF maintains its own international shark-attack case register, built from voluntary reports, media scanning, and expert verification. Entirely independent of CDC's ICD-10 death-certificate pipeline — the two describe overlapping events through different collection mechanisms.
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[2] US Centers for Disease Control and Prevention (CDC) — WISQARS — Web-based Injury Statistics Query and Reporting System
WISQARS — Web-based Injury Statistics Query and Reporting SystemSee all 2 Likelier entries citing this source →
- Statistic
WISQARS query tool for fatal and nonfatal injury data; ICD-10 coding does not isolate shark attacks from broader marine-animal contact (W56)- Excerpt
“"WISQARS is an interactive, online collection of analysis tools for fatal, nonfatal, and cost of injury data." [Note: WISQARS is a query tool, not a report. ICD-10 code W56 covers all marine-animal contact and does not distinguish shark attacks from other marine encounters. Individual query results are not quotable as static text.] ”
- Source data from
- 2023-12-01
- Accessed
- 2026-04-11 · archived copy
- Calculation
- WISQARS data confirms that ICD-10 W56 (contact with marine animal) deaths in the US are very rare. The coding does not isolate sharks from other marine animals, but the low total is consistent with the ISAF figure of ~1 US shark fatality per year.
- Independence
- ISAF and CDC draw from different case collections (voluntary international reporting vs ICD-coded death certificates), so this counts as meaningfully independent corroboration.