- Sep 1 George Georgescu, Romanian conductor and composer, dies at 76
- Sep 1 Otto Emanuel Olsson, Swedish organist and composer, dies at 84
- Sep 2 Alvin York, American World War I soldier who led a famed attack on a German machine gun nest (Medal of Honor), dies at 76
- Sep 2 Francisco Craveiro Lopes, 12th President of Portugal (1951-58), dies at 70
- Sep 2 Glenn Albert Black, American archaeologist, dies at 64
- Sep 2 Morris Ankrum, American actor (Kronos, Earth vs Flying Saucers), dies at 67
- Sep 3 Joseph Marx, Austrian composer and music critic, dies at 82
- Sep 3 Stewart Holbrook, American author (b. 1893)
- Sep 4 Werner Bergengruen, Baltic German writer (Der Großtyrann und das Gericht), dies at 71
- Sep 7 Walter Brown, American basketball and ice hockey executive (founded and owned Boston Celtics, bought Boston Bruins), dies at 59
- Sep 9 Charles O'Neill, Canadian composer, dies at 82
- Sep 14 Mary Howe, American composer and pianist (Sand), dies at 82
- Sep 15 Robert Dower, South African cricketer (1 Test South Africa v England 1898, scored 0 & 9), dies at 88
- Sep 16 Ernest Hill, American jazz double-bassist, dies at 64
- Sep 16 Leo Weismantel, German writer (Das Totenliebespar), dies at 76
- Sep 18 Clive Bell, English art critic, dies at 83
- Sep 18 J. Frank Dobie, American folklorist and newspaper columnist, dies at 75
- Sep 18 Sean O'Casey, Irish playwright (The Plough and the Stars), dies at 84
- Sep 21 Jim Koethe, American reporter for the Dallas Times Herald, investigated death of John F. Kennedy, strangled
- Sep 24 Paul E. Kahle, German professor of oriental studies, dies at 89
- Sep 25 Ida Moore, American character actress (Mr. Music; Ma and Pa Kettle; Desk Set), dies at 82
- Sep 28 George Dyson, English musician and composer, dies at 81
- Sep 28 Harpo Marx [Adolph], American actor and comedian (Marx brothers), dies at 75
- Sep 28 Mikhail Svetlov, Russian poet and writer, dies at 61
- Sep 28 Nacio Herb Brown, American composer (Singin' In The Rain), dies at 68
Assassination
Car Crash
Hanging
Killed in Action
Plane Crash
Poisoning