- Sep 1 Philip Loeb, actor (Jake-Goldbergs), dies at 61
- Sep 2 Rudolf Kattnigg, Austrian composer, dies at 60
- Sep 7 Ernst Rabel, Austrian-American lawyer, human rights activist, and author (The Conflict of Laws: A Comparative Study), dies at 81
- Sep 8 Johannes de Young, Dutch cardinal and archbishop of Utrecht, dies at 69
- Sep 10 Robert Blackburn, British aviation pioneer and the founder of Blackburn Aircraft, dies at 70
- Sep 12 Gustave Vanzype, Belgian literary figure (La Gazette), dies at 86
- Sep 14 Franz Carl Weiskopf, German Czech writer, dies at 55
- Sep 16 Leopold CMS Amery, British minister of Colonies (India), dies at 81
- Sep 19 Carl Milles, Swedish sculptor (Wedding of Rivers), dies at 80
- Sep 19 John D. Dingell, Sr., U.S. Congressman from Michigan (b. 1894)
- Sep 21 Jacqueline Reyneke van Stuwe, Dutch author, dies at 84
- Sep 25 Hendrik J. Pos, Dutch philosopher and linguist (Committee of Watchfulness), dies at 57
- Sep 27 Henri Liebrecht, Belgian playwright and journalist, dies at 71
- Sep 28 Arthur Donaldson, Swedish American actor, dies at 86
- Sep 30 Arnold Struycken, Dutch lawyer, dies at 55
James Dean (1931-1955)
Sep 30 American actor and cultural icon (Giant, Rebel Without a Cause), and 1st actor to be posthumously nominated for a Best Actor Academy Award, dies in a car crash at age 24
- Sep 30 Michael Chekhov, Russian-American actor (Rhapsody, Abie's Irish Rose), dies at 64
Assassination
Car Crash
Hanging
Killed in Action
Plane Crash
Poisoning