- Sep 5 Cornelis J "Cor" van Ast, Dutch actor and director (Ghost Hotel, Two Boys), dies at 67
- Sep 6 Arthur Rackham, English book illustrator (Grimm's Fairy Tales, Rip van Winkle), dies of cancer at 71
- Sep 7 Kyoka Izumi, Japanese novelist and kabuki playwright, dies at 65
- Sep 13 Eugene Foss, American politician (45th Governor of Massachusetts), dies at 80
- Sep 17 Ethel M. Dell, English author (Storm Drift), dies at 58
- Sep 18 Gwen John, Welsh painter, dies at 63
- Sep 18 Stanisław Ignacy Witkiewicz, Polish writer, painter, and photographer (b. 1885)
- Sep 20 Paul Bruchési, French Canadian Catholic archbishop of Montreal, dies at 83
- Sep 21 Armand Călinescu, Prime Minister of Romania, assassinated by the iron guard at 46
Sigmund Freud (1856-1939)
Sep 23 Austrian neurologist and father of psychology, dies at 83
Assassination
Car Crash
Hanging
Killed in Action
Plane Crash
Poisoning