- Sep 1 Granville English, composer, dies at 69
- Sep 2 Ernest Claes, Belgian author (The White), dies at 82
- Sep 3 Isabel Withers, American actress (b. 1896)
- Sep 5 Juan Jose Castro, composer, dies at 73
- Sep 6 Karl Rankl, Austrian-born British composer and conductor (Covent Garden Opera Company), dies at 69
- Sep 11 René Cogny, French General (b. 1904)
- Sep 12 Tommy Armour, Scottish golfer (b. 1894)
- Sep 18 Franchot Tone, American actor (Mutiny on the Bounty, Advise & Consent), dies from lung cancer at 63
- Sep 18 Francis McDonald, American actor (Will-Adv of Champion), dies at 77
- Sep 18 Willem Kooiman, Dutch theologist/church historian, dies at 65
- Sep 19 Chester F Carlson, inventor (photocopying), dies at 62
- Sep 19 Red Foley, American country singer (Mr Smith Goes to Washington), dies at 58
- Sep 20 Frank Pelleg, composer, dies at 57
- Sep 23 Francesco Forgione, "Padre Pio", Catholic saint (b. 1887)
- Sep 24 Harry Robert Wilson, composer, dies at 67
- Sep 24 Robert Arthur Ley, sci-fi author (Telepath, Power of X), dies at 47
- Sep 26 Daniel Johnson, Sr., Canadian politician, 20th Premier of Quebec, dies at 53
- Sep 28 Corry Lievens, Flemish actress/playwright/dir (Blue Bird), dies at 64
- Sep 28 Dewey Philip "Daddy-O", American pioneering DJ, dies of heart failure at 42