- Sep 5 Christophe Léon Louis Juchault de Lamoricière, French general, born in Nantes, France (d. 1865)
- Sep 11 Joshua Blackwood Howell, American Brigadier General (Union Army), born in Woodbury, New Jersey (d. 1864)
- Sep 12 Andrew Hull Foote, American Rear Admiral (Union Navy), born in New Haven, Connecticut (d. 1863)
- Sep 13 Joseph L. Hogg, American Brigadier General (Confederate Army), born in Morgan County, Georgia (d. 1862)
- Sep 13 Moritz Ganz, German composer and cellist, born in Mainz, Grand Duchy of Hesse (now Germany) (d. 1868)
- Sep 19 William Dyce, Scottish painter and educator, born in Aberdeen, Scotland (d. 1864)
- Sep 24 George Alexander Osborne, Irish pianist and composer (La Pluie de perles), born in Limerick, Ireland (d. 1893)