- Sep 1 Komei Abe, Japanese composer, born in Hiroshima (d. 2006)
- Sep 2 René Amengual, Chilean pianist, composer and educator, born in Santiago, Chile (d. 1954)
- Sep 11 Bola de Nieve [Ignacio Jacinto Villa Fernández], Cuban pianist, singer and songwriter, born in Guanabacoa, La Habana, Cuba (d. 1971)
- Sep 13 Bill Monroe, American singer known as the "Father of Bluegrass" ("Blue Moon of Kentucky"), born in Rosine, Kentucky (d. 1996)
- Sep 15 Silas Hogan, American blues singer and guitarist, born in Westover, Louisiana (d. 1994)
- Sep 17 Robert Riefling, Norwegian concert pianist and pedagogue (Royal Danish Academy, 1967-88; Norwegian Academy of Music from ,1973-88), born in Aker, Norway (d. 1988)
- Sep 19 Allan Pettersson, Swedish violist and composer (Symphony No. 7), born in Granhammar Castle, Uppland, Sweden (d. 1980)
- Sep 19 Weldon Hart, American composer, born in Bear-Place Spring, Tennessee (d. 1957)
- Sep 20 Frank De Vol, American pop arranger, composer (theme songs to My Three Sons, The Brady Bunch, Family Affair; Hush...Hush, Sweet Charlotte), orchestra leader, and actor (Fernwood 2 Night - "Happy Kyne"; The Big Mouth), born in Moundsville, West Virginia (d. 1999)
- Sep 20 Jan Mul, Dutch composer, born in Haarlem (d. 1971)
- Sep 25 Lionel Henry Nowak, American composer, born in Cleveland, Ohio (d. 1995)
- Sep 26 Hisatada Otaka, Japanese conductor (Japan Symphony Orchestra, 1942-51), and composer, born in Tokyo, Japan (d. 1951)
About September 1911
How Old? 112 years old
Generation: Greatest Generation
Leap Year: No
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