- Sep 2 Manfred Freiherr von Killinger, German ambassador to Romania, commits suicide after Romanian coup
- Sep 2 George W. Norris, U.S. Senator noted for his advocacy of political reform and of public ownership of hydroelectric-power plants, dies at 83
- Sep 2 Bella Rosenfeld, Jewish Belarusian writer, subject of Marc Chagall's paintings and his 1st wife, dies at 48
- Sep 3 FrantiĊĦek Drdla, Czech composer, dies at 75
- Sep 4 Izaak van der Horst, Dutch resistance fighter, executed at Herzogenbusch concentration camp at 35
- Sep 5 Willem M Groenewegen, resistance fighter, executed
- Sep 6 Robert Lejour, Belgian lawyer/resistance fighter, murdered
- Sep 7 Eduardo Sanchez de Fuentes, Cuban composer, dies at 70
- Sep 8 Jan van Gilse, Dutch composer and resistance fighter, dies at 63
- Sep 10 Jaap P Musch, Dutch resistance fighter, murdered by Nazis
- Sep 13 Noor Inayat Khan, Indian princess and Special Operations Executive agent in WWII posthumously awarded the George Cross, executed at Dachau at 30
- Sep 13 W. Heath Robinson, English illustrator and cartoonist (Don Quixote), dies at 72
- Sep 16 Gustav Bauer, German politician, Chancellor of Germany (1919-1920), dies at 74
- Sep 17 Friedrich Kussin, German Major-General and commander in Arnhem during Operation Market Garden, dies in battle at 49
- Sep 18 Anthony Stefanich, British boxer and Army captain, killed in Arnhem at 27
- Sep 18 Hendrikus Colijn, Dutch premier (1933-39), dies at 75
- Sep 18 Robert Cole, US lt-colonel, dies in battle at Best
- Sep 19 David Lord, British lieutenant/Dakota-pilot DFC/VC, dies in battle
- Sep 19 Hilary Barlow, British colonel, dies
Guy Gibson
Sep 19 Guy Gibson, British wing commander who led the Dambusters (Victoria Cross), dies in action at 26
- Sep 20 John Grayburn, British soldier who was posthumously awarded the Victoria Cross for gallantry during the defence of Arnhem bridge, dies during the battle at 26
- Sep 22 "Cab" Calloway, British scout, dies in battle of Oosterbeek
- Sep 23 Colijn, Neth PM, buried
- Sep 25 Jakob Schaffner, Swiss writer (Irrfahrten), dies at 68
- Sep 25 Leo Justinus Kauffmann, Alsatian composer, dies at 43
- Sep 26 Ernst Isler, Swiss organist ad critic, dies at 64
- Sep 26 Julien Cahn, cricketer (private cricket promoter during 30's), dies
- Sep 27 Aimee Semple McPherson, Canadian-American evangelist (Pentecostal), dies at 53
- Sep 27 Aristide Maillol, French painter and sculptor (Seated Woman), dies in car crash at 82
- Sep 27 Sergey Prokudin-Gorsky, Russian photographer and chemist, dies at 81