- Sep 4 Walter Tetley, American voice-over actor (Sherman-Bullwinkle Show), dies at 60
- Sep 5 Georg Ots, Estonian baritone singer and actor, dies of a brain tumor at 55
- Sep 8 John Mylong, Austrian actor (Robot Monsters), dies at 82
- Sep 9 Ethel Griffies, English actress (Billy Liar, Birds), dies at 97
- Sep 9 John McGiver, American actor (Patty Duke Show; Jimmy Stewart Show; Fitzwilly), dies from a heart attack at 61
- Sep 9 Minta Durfee, actress (Keystone Comedies, Mickey), dies at 85
- Sep 10 George Paget Thomson, English physicist who demonstrated electron diffraction (Nobel 1937), dies at 83 [1]
- Sep 10 Hans Swarowsky, Austrian pianist, conductor (Graz Opera, 1947-50), and educator (Vienna Music Academy, 1949-75), dies at 75
- Sep 10 Robert Gordon Sproul, American educator and college president (University of California), dies at 84
- Sep 12 Doc Alexander, American College Football Hall of Fame guard (Syracuse; All Pro 1921, 22; Rochester Jeffersons; NFL C'ship 1925; NY Giants), dies at 78
- Sep 14 Walter Herbert [Seligmann], German-American conductor, impresario (Houston Grand Opera, 1955- 72; San Diego Opera, 1965-77), and world champion bridge player, dies at 77
- Sep 16 Irene Hayes, Ziegfeld girl and businesswoman (b. 1896)
- Sep 18 Fairfield Porter, American painter, dies at 68
- Sep 18 Pamela Brown, British actress (Cleopatra, I Know Where I'm Going!, Beckett), dies from pancreatic cancer at 58
- Sep 20 Saint-John Perse, French diplomat and poet (Nobel 1960), dies at 78
- Sep 20 Vincent Lopez, American pianist and big band bandleader ("Nola"), dies at 79
- Sep 22 Franz Salmhofer, Austrian composer and musician, dies at 75
- Sep 22 Patricia Doyle, English actress (Wuthering Heights), dies at 60
- Sep 23 Constant Stotijn, Dutch cellist (Residence Orchestra), oboe player, and timpanist, dies at 62
- Sep 23 Ian Hunter, South African character actor (Dr. Blood's Coffin; White Unicorn), dies at 75
- Sep 23 René Thomas, French auto racer (Indianapolis 500 1914), dies at 89
- Sep 24 Clive Morton, British actor (Goodbye Mr Chips, Moonraker), dies at 71
- Sep 24 Earle Cabell, American politician, 48th Mayor of Dallas (1961-64), dies at 68
- Sep 25 Bob Considine, American journalist and author (Babe Ruth Story), dies at 68
- Sep 26 Jacob Paludan, Danish writer and critic (Jorgen Stein), dies at 79
- Sep 27 Jack Lang, Australian politician (b. 1876)
- Sep 27 Mark Frechette, actor (Zabriskie Point, Uomini Contro), dies at 27
- Sep 28 Agnes Windeck, German actress (A Time to Love and a Time to Die), dies at 87
- Sep 28 Sidney Fields, American comedian and actor (Abbott & Costello), dies at 77
Casey Stengel (1890-1975)
Sep 29 American Baseball HOF outfielder (World Series 1921, 22 NY Giants) and manager (7 x World Series NY Yankees; NY Mets 1st manager), dies of cancer at 85
Assassination
Car Crash
Hanging
Killed in Action
Plane Crash
Poisoning