- Sep 3 Armistead Lindsay Long, American Brigadier General (Confederate Army), born in Campbell County, Virginia (d. 1891)
- Sep 3 William Wallace Burns, American Brigadier General (Union Army), born in Coshocton, Ohio (d. 1892)
- Sep 4 Dadabhai Naoroji, 1st Indian in British parliament, born in Mumbai, India (d. 1917)
- Sep 11 Eduard Hanslick, German music critic, born in Prague, Czech Republic (d. 1904)
- Sep 17 Lucius Quintus Cincinnatus Lamar, American politician and U.S. Supreme Court Justice, born in Eatonton, Georgia (d. 1893)
- Sep 24 Frances Harper, African-American abolinist, suffragist and writer (Iola Leroy), born in Baltimore, Maryland (d. 1911)