- Sep 4 Charles Dilke, British statesman and Radical politician, born in London (d. 1911)
- Sep 4 Ján Levoslav Bella, Slovak composer, born in Liptovský Mikuláš, Austrian Empire (d. 1936)
- Sep 15 Maurice, Prince of the Netherlands, son of King William III (d. 1850)
- Sep 21 David Emlyn Evans, Welsh composer, born in Pen’ralltwen, Newcastle Emlyn, Carmarthen, Wales (d. 1913)
- Sep 25 Melville Reuben Bissell, American inventor of the carpet sweeper, born in Hartwick, New York (d. 1889)
- Sep 25 Thomas Chrowder Chamberlin, American geologist and educator, born in Mattoon, Illinois (d. 1928)
- Sep 27 Gaston Tarry, French mathematician, born in Villefranche de Rouergue, Aveyron, France (d. 1913)
- Sep 29 Mikhail Skobelev 'the White General', Russian general during Russo-Turkish War, born in Saint Petersburg, Russia (d. 1882)