- Sep 1 Jean Canneel, Flemish sculptor, dies at 73
- Sep 3 Cruys Voorbergh [Ernest Pieter Coningh], Dutch actor and director (De vliegende Hollander, Flying Dutchman), dies from cardiac arrest at 64
- Sep 3 Frico Kafenda, Slovak composer, dies at 79
- Sep 4 Robert Schuman, Luxembourg-born French statesman and Prime Minister of France (1947-48), dies at 77
- Sep 6 Margarita Sierra, actress (Surfside 6), dies after heart surgery at 26
- Sep 9 Ernst Kantorowicz, German-American historian (Laudes regiae), dies at 68
- Sep 9 Jan Schouten, Dutch founder (illegal Trouw)/chairman (ARP), dies
- Sep 10 Eugène Baie, Belgian author (Sub rosa et sub umbra), dies at 89
- Sep 12 Ben Sealey, cricketer (one Test WI v England 1933), dies
- Sep 12 Mervyn A. Ellison, British astronomer (spectrohelioscope), dies at 63
- Sep 15 Fred Hillebrand, American actor (Martin Kane, Moon Over Manhattan), dies at 69
- Sep 17 Eduard Spranger, German psychologist and educator, dies at 81
- Sep 21 Paulino Masip, Spanish playwright (b. 1899)
- Sep 22 Fred Le Roux, cricketer (South African all-rounder in only Test), dies
- Sep 27 Andy Coakley, American baseball player and long-time coach at Columbia University, dies at 80
- Sep 30 Arnold Foster, English composer, dies at 66