- Sep 1 Don Wilson, American radio and TV announcer (Jack Benny Show), born in Lincoln, Nebraska (d. 1982)
- Sep 1 Kazimierz Wilkomirski, Polish cellist, composer, conductor, administrator, and educator, born in Moscow, Russian Empire (d. 1995)
- Sep 3 Percy Chapman, English cricket batsman (26 Tests, captain 1926-31, 1 x 100; Kent CCC), born in Reading, England (d. 1961)
- Sep 3 Urho Kekkonen, 8th President of Finland (1956-81), born in Pielavesi, Finland (d. 1986)
- Sep 4 Cornelis Verolme, Dutch ship builder, born in Nieuwe-Tonge, Netherlands (d. 1981)
- Sep 6 Julien Green, American-French writer (Frere Francois), born in Paris (d. 1998)
- Sep 6 W.A.C. Bennett, Canadian politician, born in New Brunswick, Canada (d. 1979)
- Sep 7 Emerson Treacy, American actor (California Straight Ahead, Prowler), born in Philadelphia, Pennsylvania (d. 1967)
- Sep 7 Taylor Caldwell [Janet Miriam Holland Taylor Caldwell], Anglo-American novelist (Dynasty of Death, Dear and Glorious Physician), born in Manchester, England (d. 1985)
- Sep 8 Claude Pepper, American politician (Rep-D-FL, 1963-89), born in Dudleyville, Chambers County, Alabama (d. 1989)
- Sep 8 Gavin Muir, American actor (Mary of Scotland, Johnny Trouble), born in Chicago, Illinois (d. 1972)
- Sep 9 James Hilton, English novelist and screenwriter (Goodbye Mr Chips), born in Leigh, England (d. 1954)
- Sep 11 D. W. Brooks, American farmer and businessman, born in Royston, Georgia (d. 1999)
- Sep 12 Eric Harding Thiman, English composer, born in Ashford, Kent (d. 1975)
- Sep 13 Gladys George, American actress (Roaring Twenties), born in Patten, Maine (d. 1954)
- Sep 14 Andrey Vlasov, Russian-Soviet army general and Nazi collaborator, born in in Lomakino, Nizhny Novgorod Governorate, Russian Empire (d. 1946)
- Sep 14 Sidney Marion, American actor (Outlaws is Coming, Quicksand), born in Massachusetts (d. 1965)
- Sep 17 Hughie Critz, American MLB baseball player (Cincinnati Reds), born in Starkville, Mississippi (d. 1980)
- Sep 17 J. Willard Marriott, American entrepreneur and hotelier (founder of Marriott Corporation), born in Marriott Settlement, Utah (d. 1985)
- Sep 19 Ricardo Cortez [Jacob Krantz], American actor and director (The Maltese Falcon), born in New York City (d. 1977)
- Sep 19 Solomon Pimsleur, French composer, born in Parigi, France (d. 1962)
- Sep 20 Humberto de Alencar Castelo Branco, Brazilian military leader and 26th President of Brazil (1964-67), born in Fortaleza, Ceará, Brazil (d. 1967)
- Sep 20 Uuno Klami, Finnish composer (Psalmus; Kalevala Suite), born in Virolahti, Finland (d. 1961)
- Sep 20 Wilhelm Weismann, German composer, born in Alfdorf, Germany (d. 1980)
- Sep 22 Paul H. Emmett, American chemical engineer (d. 1985)
- Sep 22 William Spratling, American silversmith who worked in Mexico, born in Sonyea, New York (d. 1967)
- Sep 23 Bill Stone, British serviceman; one of the last surviving veterans of World War I, born in Ledstone, England (d. 2009)
- Sep 23 Fred Koch, American chemical engineer and entrepreneur (Koch Industries), born in Quanah, Texas (d. 1967)
- Sep 24 Ham Fisher, American comic strip writer and cartoonist (Joe Palooka), born in Wilkes-Barre, Pennsylvania (d. 1955)
- Sep 29 Miguel Alemán Valdés, Mexican attorney and President of Mexico (1946-52), born in Sayula, Veracruz, Mexico (d. 1983)
About September 1900
How Old? 123 years old
Generation: Lost Generation
Leap Year: No
Year of the Rabbit
Year of the Dragon
Year of the Snake
Year of the Horse
Year of the Goat/Sheep
Year of the Monkey