- Sep 12 Rainis, Latvian poet and playwright (b. 1865)
- Sep 15 Sara Amsel, Indon/Dutch actress/wife of Carel van Hoisted, dies at 58
- Sep 18 Hermann Gradener, composer, dies at 85
- Sep 23 Richard A Zsigmondy, Austria chemist (Nobel 1925), dies at 64
- Sep 25 Miller Huggins, American baseball player and manager (NY Yankees), dies from blood poisoning at 49
- Sep 29 Giitji Tanaka, Japanese baron/general/premier (1927-29), dies at 66
- Sep 30 Charles E Bonin, French explorer/diplomat (China), dies