- Oct 1 Eugene O'Keefe, Canadian businessman and brewer (O'Keefe Brewery Company of Toronto Limited), dies at 85
- Oct 5 Hans von Bartels, German painter (b. 1856)
- Oct 10 Adolphus Busch, German-born American brewer (Anheuser-Busch), dies at 74
- Oct 10 Katsura Taro, Japanese general and politician (Prime Minister of Japan 1901-1906, 1908-1911, 1912-1913), dies of cancer at 65
- Oct 20 Daniel David Palmer, Canadian founder of chiropractic (1897 Palmer School of Chiropractic), dies of typhoid fever at 68
- Oct 20 Leander Schlegel, Dutch composer and pianist, dies at 69
- Oct 23 Edwin Klebs, German physician and bacteriologist (bacterial theory of infection, diphtheria bacillus), dies at 79
- Oct 24 Isabel Barrows, American editor and penologist (Conference on Negro Question), dies at 68
- Oct 31 William Evans-Gordon, British politician (b. 1857)
Assassination
Drug Overdose
Gunshot Wound
Murder
Plane Crash
Suicide