- Sep 1 Omar Rodriguez-Lopez, Puerto Rican guitarist
- Sep 4 Mark Ronson, British-American musician, songwriter and DJ (Uptown Funk), born in London, England
- Sep 5 Jamie Spaniolo, American horrorcore rapper, born in Detroit, Michigan
- Sep 8 Richard Hughes, English musician (Keane), born in Gravesend, Kent, England
- Sep 9 Michael Bublé, Canadian singer and actor (Crazy Love), born in Burnaby, Canada
- Sep 11 Mark Klepaski, American musician, born in Wilkes-Barre, Pennsylvania
- Sep 13 Joe Don Rooney, American musician (Rascal Flatts), born in Baxter Springs, Kansas
- Sep 17 Constantine Maroulis, American rock singer (American Idol, season 4), born in Brooklyn, New York
- Sep 22 Svilen Noev, Bulgarian singer-songwriter
- Sep 23 Layzie Bone [Steven Howse], American rapper (Bone Thugs-N-Harmony), born in Cleveland, Ohio
- Sep 25 Mariusz Duda, Polish rock bassist and singer (Riverside), born in Wegorzewo, Poland
- Sep 26 Emma Härdelin, Swedish singer (Garmarna and Triakel), born in Krokom, Sweden
- Sep 28 Mandy Barnett, American country singer ("Maybe"; "The Whispering Wind"), born in Crossville, Tennesee
About September 1975
How Old? 45 years old
Generation: Generation X
Leap Year: No