- Sep 2 An Jung-geun, Korean independence activist and assassin of Japanese Prime Minister Ito Hirobumi, born in Haeju-bu, Hwanghaedo, Korea (d. 1910)
- Sep 6 Max Schreck, German actor (Count Orlok-Nosferatu), born in Berlin, Germany (d. 1936)
- Sep 6 Neal Rev Dodd, American actor (You Belong to Me), born in Fort Madison, Iowa (d. 1966)
- Sep 12 Fausto Agnelli, Swiss painter, born in Lugano, Switzerland (d. 1944)
Margaret Sanger (1879-1966)
Sep 14 American nurse, birth control proponent and feminist, born in Corning, New York
- Sep 15 Alec Ross, Scottish golfer (US Open 1907), born in Dornoch, Scotland (d. 1952)
- Sep 15 Joseph Lyons, 10th Prime Minister of Australia (1932-39), born in Stanley, Tasmania (d. 1939)
- Sep 17 Periyar E. V. Ramasamy, Indian Social social activist and reformer, born in Erode, Madras Presidency, British India (d. 1973)
- Sep 17 Rube Foster, American Baseball HOF manager and executive (Negro National League pennant 1920–22, 26; Chicago American Giants), born in Calvert, Texas (d. 1930)
- Sep 20 Victor Sjöström, Swedish director (Wind, Under the Red Robe), born in Årjäng, Värmland, Sweden (d. 1960)
- Sep 25 Lope K. Santos, Filipino writer and Father of the Philippine National Language and Grammar, born in Pasig, Philippines (d. 1963)
- Sep 25 Luiz Costa, Portuguese pianist, and composer, born in Monte de Fralães, Barcelos, Portugal (d. 1960)
- Sep 26 Petko Todorov, Bulgarian writer (Fairy, Samodiva Fee), born in Elena, Bulgaria (d. 1916)
- Sep 27 Cyril Scott, British composer and author (Heroic Suite), born in Oxton, Cheshire, England (d. 1970)
- Sep 27 Hans Hahn, Austrian mathematician, born in Vienna, Austria-Hungary (d. 1934)
- Sep 28 Benjamin Christensen, Danish actor (Barnet, Mockery) and film director (Häxan), born in Viborg Denmark (d. 1959)
- Sep 29 Joaquín Nin, Cuban composer and pianist, father of Anaïs Nin, born in Havana, Cuba (d. 1949)
- Sep 30 Ernst Isler, Swiss organist and critic, born in Zurich (d. 1944)
- Sep 30 Henri Casadesus, French violist and composer (Preludes for Viola d'amour), born in Paris, France (d. 1947)