- Sep 6 Felix Borowski, British-American composer, educator (Chicago Musical College, 1896-1925), and musicologist (Chicago Symphony, 1908-56), dies at 84
- Sep 6 Michael Ventris, English architect who deciphered Linear B, dies in a car accident at 34
- Sep 7 C. B. Fry, English cricket batsman (26 Tests, 2 x 100s; Sussex, Hampshire), dies at 84
- Sep 8 Fred Rich, Polish-American jazz pianist and dance band bandleader ("I'm Tickled Pink with a Blue-Eyed Baby"; The Abbott and Costello Show), dies at 58
- Sep 8 Gerrit Bolkestein, Dutch minister of Education (1939-45), dies at 84
- Sep 8 Vital Celen, Flemish writer ('t Pastoorke van Vossendonck), dies at 69
Billy Bishop (1894-1956)
Sep 11 Canadian First World War flying ace with 72 kills, dies at 62
- Sep 12 Hans Carossa, German writer, dies at 77
- Sep 12 Sándor Graf Festetics, Hungarian nobleman and politician (Minister of War, 1918-19), dies at 74
- Sep 15 Henry Clough-Leiter, American composer, dies at 82
- Sep 16 Shorty Ray, American football player and supervisor of NFL officials, dies at 71
- Sep 18 Adélard Godbout, Canadian politician (15th Premier of Quebec), dies at 63
- Sep 20 Theo Frenkel, Dutch actor (Footlights, Hague's Comedy), dies at 85
- Sep 21 Anastasio Somoza García [Tacho], General, dictator and President of Nicaragua (1937-56), assassinated by Roliberto Lopez at 60
- Sep 21 Robert Mills Delaney, American composer, dies at 53
Frederick Soddy (1877-1956)
Sep 22 English radiochemist and Nobel laureate (radioactive substances, isotopes), dies at 79
Babe Didrikson Zaharias (1911-1956)
Sep 27 American all-round athlete (10 LPGA majors, Olympic gold medals 80m hurdles, javelin 1932), dies of colon cancer at 45
- Sep 27 Gerald Finzi, British composer (Dies natalis), dies of disseminated shingles, complicated by encephalitis at 55
- Sep 27 Milburn G. Apt, American test pilot, 1st person to exceed Mach 3, killed in a X-2 rocket plane reaching 3370 kph, dies in the crash at 32
William Boeing (1881-1956)
Sep 28 American aviation pioneer who founded The Boeing Company, dies at 74
Assassination
Car Crash
Hanging
Killed in Action
Plane Crash
Poisoning