- Oct 3 Henry Lerolle, French painter, born in Paris (d. 1929)
- Oct 5 Guido von List, Austrian-German occultist and novelist (Jung Diethers Heimkehr), born in Vienna (d. 1919)
- Oct 17 William "Candy" Cummings, American Baseball Hall of Fame pitcher (credited with creating the curveball), born in Ware, Massachusetts (d. 1924)
- Oct 30 Zinovy Rozhestvensky, Russian vice-admiral (d. 1909)
- Oct 31 Boston Custer, brother of George Armstrong Custer, born in New Rumley, Ohio (d. 1876)