- Sep 3 Nicholas "Felix" Wanostrocht, English amateur cricket batsman (Kent, Surry), dies at 71
- Sep 5 Manuel Blanco Encalada, first president of Chile (b. 1790)
- Sep 9 American Horse, Sioux chief, dies in battle
- Sep 12 Henry A. Wise, American lawyer and politician (33rd Governor of Virginia), dies at 69
- Sep 25 Adolf Glassbrenner, German satirical writer, dies at 66
- Sep 27 Braxton Bragg, American Confederate general (b. 1817)