- Oct 13 James Shedden Palmer, American Commander (Union Navy), born in Elizabethtown, New Jersey (d. 1867)
- Oct 19 Cassius Marcellus Clay, American Major General (Union Army), born in Madison County, Kentucky (d. 1903)
- Oct 22 Henry Bohlen, German-American Brigadier General (Union Army), Bremen, Germany (d. 1862)
- Oct 23 William Leidesdorff, Mixed-race early Californian businessman, born in Christiansted, Virgin Islands, Danish West Indies (d. 1848)
- Oct 28 Adley H. Gladden, American Brigadier General (Confederate Army), born in Fairfield District, South Carolina (d. 1862)