- Sep 2 William P. Frye, American politician (d. 1911)
Frederic Mistral (1830-1914)
Sep 8 French Provencal poet (Nobel 1904), born in Maillane, France
- Sep 12 William Sprague IV, American politician and Governor of Rhode Island (1859-63), born in Cranston, Rhode Island (d. 1915)
- Sep 13 Marie von Ebner-Eschenbach, Austrian writer (The Child of the Parish), born in Zdislavič, Moravia (d. 1916)
- Sep 15 José de la Cruz Porfirio Díaz Mori, Mexican military man, politician, and dictator (President of Mexico, 1877-1911), born in Oaxaca, Mexico (d. 1915)
- Sep 25 Karl Klindworth, German pianist and conductor, born in Hanover, Germany (d. 1916)
- Sep 27 William Babcock Hazen, American Major General (Union Army), born in West Hartford, Vermont (d. 1887)
- Sep 29 John Parker Hawkins, American Brevet Major General (Union Army), born in Indianapolis, Indiana (d. 1914)