United States military casualties of war
This article lists the United States's military dead, wounded, and missing person totals for wars and major deployments.
Overview
Note: "Total U.S. casualties" includes wounded, combat and non-combat deaths but not missing in action. "Deaths – other" includes all non-combat deaths including those from accidents, disease, suicide, and murder.Wars ranked by total number of U.S. military deaths
| Rank | War | Years | Deaths | Deaths per day | U.S. population in first year of war | Deaths as percentage of population |
| 1 | American Civil War | 1861–65 | 655,000 | 449 | 31,443,000 | 2.083% |
| 2 | World War II | 1941–45 | 405,399 | 297 | 133,402,000 | 0.307% |
| 3 | World War I | 1917–18 | 116,516 | 200 | 103,268,000 | 0.110% |
| 4 | Vietnam War | 1961–75 | 58,209 | 11 | 179,323,175 | 0.032% |
| 5 | Korean War | 1950–53 | 36,574 | 30 | 151,325,000 | 0.024% |
| 6 | American Revolutionary War | 1775–83 | 25,000 | 11 | 2,500,000 | 1.00% |
| 7 | War of 1812 | 1812–15 | 15,000 | 15 | 8,000,000 | 0.207% |
| 8 | Mexican–American War | 1846–48 | 13,283 | 29 | 21,406,000 | 0.057% |
| 9 | Iraq War | 2003–11 | 4,576 | 2 | 294,043,000 | 0.002% |
| 10 | Philippine–American War | 1899–1902 | 4,196 | 3.8 | 72,129,001 | 0.006% |
| 11 | Spanish–American War | 1898 | 2,246 | 9.6 | 62,022,250 | 0.004% |
| 12 | War in Afghanistan | 2001–present | 2,216 | 0.36 | 294,043,000 | 0.001% |
"Deaths per day" is the total number of Americans killed in military service, divided by the number of days between the dates of the commencement and end of hostilities. "Deaths per population" is the total number of deaths in military service, divided by the U.S. population of the year indicated.
Wars ranked by U.S. combat deaths
| Rank | War | Years | Deaths |
| 1 | World War II | 1941–45 | 291,557 |
| 2 | American Civil War | 1861–65 | 214,938 |
| 3 | World War I | 1917–18 | 53,402 |
| 4 | Vietnam War | 1955–75 | 47,424 |
| 5 | Korean War | 1950–53 | 33,686 |
| 6 | American Revolutionary War | 1775–83 | 8,000 |
| 7 | Iraq War | 2003–2011 | 3,836 |
| 8 | War of 1812 | 1812–15 | 2,260 |
| 9 | War in Afghanistan | 2001–present | 1,833 |
| 10 | Mexican–American War | 1846–49 | 1,733 |