A casualty is a victim of an accident, injury or trauma. Human casualties are those people who have been killed or injured in a war, military combat, or disaster. People who are killed by disease in a war zone are also considered casualties. The number of casualties is often quoted by the media in these situations.

Casualties of War include all persons wounded (mentally or physically) or killed during a period of declared conflict. Deaths are separated into "in-action" deaths (KIA) and often total number deaths, which includes civilians.

See also

• Collateral damage
• Civilian casualties
• United States casualties of war

Other uses of the word:

• The emergency room of a hospital is also known as the casualty department in Commonwealth countries.
• Casualty is also the name of a long-running UK television series, set in such a department.
• The Casualties is a well-known punk rock band.