List of battles and other violent events by death toll World War I World War I

| Estimate | Name_ | Nat_ | Ship_Type | Principal_victims | Date_ |
|---|---|---|---|---|---|
| 1255 | HMS Queen Mary | UK | Battlecruiser | Crew | May 31, 1916 |
| 1198 | RMS Lusitania | UK | Ocean Liner | Civilians | May 7, 1915 |
| 1015 | HMS Invincible | UK | Battlecruiser | Crew | May 31, 1916 |
| 1013 | HMS Indefatigable | UK | Battlecruiser | Crew | May 31, 1916 |
| 903 | HMS Defence | UK | Armoured cruiser | Crew | May 31, 1916 |
| 900 | HMS Good Hope | UK | Armoured Cruiser | Crew | Nov 1, 1914 |
| 857 | HMS Black Prince | UK | Armoured Cruiser | Crew | May 31, 1916 |
| 843 | HMS Vanguard | UK | Battleship | Crew | Jul 19, 1917 |
| 839 | SMS Pommern | Ger | Battleship | Crew | Jun 1, 1916 |
| 782 | SMS Blücher | Ger | Armoured Cruiser | Crew | Jan 24, 1915 |