- Sep 6 Edmund Gwenn, English actor (Miracle on 34th Street), dies at 81
- Sep 6 Kay Kendall [Justine McCarthy], British actress (Genevieve, The Constant Husband, Les Girls), dies of leukemia at 32
- Sep 7 Maurice Duplessis, Canadian politician, 16th Premier of Quebec, dies at 69
- Sep 9 Collie Smith, West Indian cricket all-rounder (26 Tests, 4 x 100, HS 168; Jamaica), dies in a car crash at 26
- Sep 9 Max d'Ollone, French composer and writer (Le Ménestrel), dies at 84
- Sep 11 Paul Douglas, American actor (Adventure Theater; Clash by Night), dies from a heart attack at 52
- Sep 13 Gilbert Adrian [Greenberg], American costume designer (The Wizard of Oz), dies of a heart attack at 56
- Sep 14 Wayne Morris, American actor and decorated WWII pilot (Paths of Glory, The Bushwackers), dies from a heart attack at 45
- Sep 17 Bert Leysen, Belgian TV director (Belgian National TV), dies at 39
- Sep 18 Harvey Glatman, American rapist and serial killer, executed in the gas chamber of San Quentin State Prison, in Marin County, California at 31
- Sep 20 Olin Howland, American actor (Gone With The Wind; Them!; Circus Boy), dies at 73
- Sep 22 Benjamin Peret, French writer and poet (Le grand jeu), dies at 60
- Sep 22 Edmund Ironside, 1st Baron Ironside, British fieldmarshal, dies at 79
- Sep 22 Jane Winton, American actress (Hell's Angel, Patsy, Don Juan), dies at 53
- Sep 22 Josef Matthias Hauer, Austrian composer and music theorist, dies at 76
- Sep 25 Ennio Porrino, Italian composer, dies at 49
- Sep 25 Helen Broderick, American comedienne and actress (Swing Time; Top Hat), dies at 68
- Sep 26 S.W.R.D. Bandaranaike, 4th Prime Minister of Sri Lanka (1956-59), assassinated by a Buddhist monk at 60
- Sep 28 Gerard Hoffnung, German-British artist, humorist and tuba player (Hoffnung Music Festival), dies at 34
- Sep 28 Rudolf Caracciola, German race car driver (b. 1901)
- Sep 28 Vincent Richards, American tennis player (US Pro C'ships 1927-28, 30, 33), dies of a heart attack at 56
- Sep 29 Bruce Bairnsfather, British cartoonist (Old Bill), dies at 72
- Sep 29 Harold Huber [Huberman], American radio, stage, a,d screen actor (I Cover Times Square), dies at 49
- Sep 30 John Kliegl, American developer of Klieg light used in filmmaking, dies at 89
- Sep 30 Ross Granville Harrison, American Biologist and Zoologist (organ transplant pioneer), dies at 89
- Sep 30 Taylor Holmes, American actor (Sleeping Beauty, Gentlemen Prefer Blondes), dies at 81
Assassination
Car Crash
Hanging
Killed in Action
Plane Crash
Poisoning