- Oct 4 Marcelo Torcuato de Alvear, President of Argentina (1922-28), born in Buenos Aires, Argentina (d. 1942)
- Oct 7 Fred Hovey, American tennis player (US Nationals 1895), born in Newton Centre, Massachusetts (d. 1945)
- Oct 8 Max Slevogt, German painter, born in Landshut, Germany (d. 1932)
- Oct 10 Guillermo M. Tomás, Cuban composer, born in Cienfuegos, Cuba (d. 1933)
- Oct 16 Franz X Ritter von Epp, German general (China)
- Oct 18 Ernst Didring, Swedish author (d. 1931)
- Oct 19 Bertha Landes, 1st woman elected mayor of a major US city (Seattle)
- Oct 23 Frederick Lanchester, English Engineer who built the first British petrol automobile (1896), born in London, England (d. 1946)
- Oct 24 Alexandra David-Néel, Belgian-French explorer and writer, born in Saint-Mandé, France (d. 1969)
- Oct 27 Annie Patterson, Irish organist, composer, and musicologist born in Lurgan, Ireland (d. 1934)