- Sep 2 Tom Williams, Irish republican (b. 1924)
- Sep 5 François de Labouchère, French aviator of World War II, compagnon de la Libération. (b. 1917)
- Sep 7 Cecilia Beaux, American portrait painter dies at 87
- Sep 10 Nachman N "Neddy" Bamberg, actor, dies in Auschwitz at 63
- Sep 14 E.S. Gosney, American eugenicist (b. 1855)
- Sep 15 Jack Singer, American war reporter, dies aboard USS Wasp
- Sep 19 Condé Nast, American publisher, founded Condé Nast company (Vanity Fair), dies at 69
- Sep 22 Ralph Adams Cram, American gothic architect (Cathedral of St Joan NYC), dies at 78
- Sep 27 Douglas Munro, American military mariner (only WWII US Coast Guard member awarded Medal of Honor), dies in battle near Guadalcanal Island at 22
- Sep 28 Eva Thatcher, American actress, dies at 80
Assassination
Car Crash
Hanging
Killed in Action
Plane Crash
Poisoning