- Sep 1 Giuseppe Giacosa, Italian playwright, poet, and librettist (Puccini's "La bohème", "Tosca", and "Madama Butterfly"), dies at 58
- Sep 5 Ludwig Boltzmann, Austrian physicist (thermodynamics), dies at 62
- Sep 13 Georges Jacobi, German violinist, composer (The Black Crook), and conductor (Alhambra Theatre, London, 1872-98), dies at 66
- Sep 19 Maria Georgina Grey, British writer and founder of the Girls' Day School Trust (b. 1816)
- Sep 20 Robert R. Hitt, American politician (b. 1834)
- Sep 21 Samuel Arnold, American conspirator who plotted to kidnap Abraham Lincoln, dies at 72
- Sep 23 Jan van Rijswijck, Flemish journalist and politician (Mayor of Antwerp, 1892-1906; Member of Parliament, 1900-06), dies at 53
Assassination
Car Crash
Hanging
Killed in Action
Plane Crash
Poisoning