- Jun 1 Lucien Guitry, French actor (La Dame aux camélias), dies at 64
- Jun 4 Gheorghe Dima, Romanian composer, dies at 77
- Jun 4 Pierre Louÿs, French writer (Aphrodite), dies at 54
- Jun 7 Camille Flammarion, French astronomer, Mars researcher and popularizer of astronomy, dies at 83
- Jun 16 Chittaranjan Das, Indian lawyer, politician and activist (founded Swaraj Party), dies at 55
- Jun 16 Emmett Hardy, American jazz cornetist, dies of tuberculosis at 22
- Jun 18 Robert M. La Follette, American lawyer and presidential candidate (Progressive), dies at 70
- Jun 20 Josef Breuer, Austrian psychologist (b. 1842)
- Jun 20 Wilhelm Posse, German composer, dies at 72
- Jun 21 J. H. Leopold, Dutch poet (translated Omar Khayyam), dies at 60
- Jun 22 Felix Klein, German mathematician (Evanstan Colloquium), dies at 76
Assassination
Drug Overdose
Gunshot Wound
Murder
Plane Crash
Suicide