- Sep 5 Ignacij Klemenčič, Slovenian physicist (b. 1853)
- Sep 8 Johannes von Miquel, German politician (Vice President Kingdom of Prussia 1897-1901), dies at 73
- Sep 9 Henri de Toulouse-Lautrec, French painter and printmaker (At the Moulin Rouge), dies from the effects of alcoholism and syphilis at 36
- Sep 9 Willem van Goltstein van Oldenaller, Dutch minister of Colonies dies at 70
William McKinley (1843-1901)
Sep 14 25th US President (Republican: 1897-1901), dies in Buffalo at 58, after being shot 8 days earlier by anarchist Leon Czolgosz
- Sep 25 Arthur Fremantle, British general and American Civil War observer (b. 1835)
Assassination
Car Crash
Hanging
Killed in Action
Plane Crash
Poisoning