- Oct 1 Francis Cockrell, American Brigadier General (Confederate Army), born in Warrensburg, Missouri (d. 1915)
- Oct 3 Vilém Blodek [Plodek], Czech pianist, flautist, and composer, born in Prague, Kingdom of Bohemia (now Czech Republic) (d. 1874)
- Oct 8 Walter Kittredge, American musician during American Civil War, born in Merrimack, New Hampshire (d. 1905)
- Oct 10 Aleksis Kivi, Finnish writer and poet (Nummisuutarit), born in Nurmijärvi, Grand Duchy of Finland (d. 1872)
- Oct 19 Francis Channing Barlow, American lawyer, Union general (US Civil War, meet with General John Brown Gordon at Gettysburg), born in Brooklyn, New York (d. 1896)
- Oct 28 Dudley M. DuBose, American Brigadier General (Confederate Army), born in Memphis, Tennessee (d. 1883)