- Sep 1 Adolphe Appia, Swiss set designer and theorist (Wagner Opera sets), born in Geneva, Switzerland (d. 1928)
- Sep 2 Alphons Diepenbrock, Dutch composer, conductor, and essayist, born in Amsterdam, Netherlands (d. 1936)
- Sep 2 Franjo Krežma, Croatian violinist, born in Osijek, Croatia (d. 1881)
- Sep 11 Hawley Harvey Crippen [Dr Crippen], American homeopath and first killer to be caught with the aid of wireless telegraphy, born in Coldwater, Michigan (d. 1910)
- Sep 11 Julian Byng, 1st Viscount Byng of Vimy, British army officer, born in Wrotham Park, Hertfordshire, England (d. 1935)
O. Henry (1862-1910)
Sep 11 American short story writer (Cabbages and Kings), born in Greensboro, North Carolina
- Sep 13 Dirk Bos, Dutch Liberal 2nd Member of Parliament, born in Groningen, Netherlands (d. 1916)
- Sep 19 Adeline De Walt Reynolds, American actress (Son of Dracula), born in Benton County, Iowa (d. 1961)
- Sep 21 James E. Talmage, English religious leader (LDS Church apostle), born in Hungerford, Berkshire, England (d. 1933)
- Sep 21 Johan Castberg, Norwegian politician (Castbergian Child Laws protecting extra-martial children), born in Brevik, Norway (d. 1926)
- Sep 25 Billy Hughes, 7th Prime Minister of Australia (Labor, Nationalist: 1915-23), born in London (d. 1952)
- Sep 25 Léon Boëllmann, French organist and composer (Variations Symphoniques; Suite Gothique), born in Ensisheim, Alsace, France (d. 1897)
Louis Botha (1862-1919)
Sep 27 Boer general and statesman, 1st Prime Minister of South Africa (1910-19), born in Greytown, Natal
- Sep 30 Georgy Eduardovich Konyus (Conus), Russian composer, and music theorist, born in Moscow, Russia (d. 1933)