🌊 Deadliest Tsunamis in Recorded History
Direct answer: the deadliest tsunami in our documented records is the 2004 Indian Ocean Earthquake and Tsunami (2004), with an estimated 227,898 deaths (USGS-cited figure; estimates range ~225,000–280,000). Death tolls for events before modern record-keeping vary widely between sources; every figure below links to its citation.
| # | Event | Type | Country | Year | Estimated deaths |
|---|---|---|---|---|---|
| 1 | 2004 Indian Ocean Earthquake and Tsunami | Tsunami | Indonesia | 2004 | 227,898 * |
| 2 | 2011 Tōhoku Earthquake and Tsunami | Tsunami | Japan | 2011 | 19,759 * |
| 3 | 2018 Sulawesi Earthquake and Tsunami | Tsunami | Indonesia | 2018 | 4,340 * |
* Figures marked with an asterisk carry significant uncertainty — open each event for its sources and uncertainty note. Historical death tolls, especially before 1900, are estimates that differ between reputable sources. Coverage depends on available documentation; see our methodology.