- Sep 2 Hiroki Yoshimoto, Japanese racing driver
- Sep 2 Dany Sabourin, French Canadian Goaltender in the National Hockey League
- Sep 3 The B.G. [Christopher Dorsey], American rapper, born in New Orleans, Louisiana
- Sep 3 Daniel Ruben Bilos, Argentinian footballer, born in Pergamino, Argentina
- Sep 3 Cone McCaslin, Canadian bassist (Sum 41), born in North York, Ontario
- Sep 3 Jennie Finch, American softball player (Olympic Gold 2004, Silver 2008), born in La Mirada, California
- Sep 4 Hitomi Shimatani, Japanese pop singer, born in Kure, Japan
- Sep 4 Pat Neshek, American baseball player, born in Madison, Wisconsin
- Sep 4 Tamika Mallory, American activist and founder of Mallory Consulting, born in New York City, New York
- Sep 5 Franco Costanzo, Argentinian football goalkeeper, born in Río Cuarto, Argentina
- Sep 6 Samuel Peter, Nigerian-American heavyweight boxer, born in Akwa Ibom, Nigeria
- Sep 6 Joseph Yobo, Nigerian footballer (Nigerian national team captain), born in Kono, Rivers State, Nigeria
- Sep 6 Yuji Hamano, Japanese archer, born in Hiroshima, Japan
- Sep 6 Jillian Hall, American professional wrestler, born in Ashland, Kentucky
- Sep 6 Kerry Katona, British singer-songwriter (Atomic Kitten), born in Warrington, Cheshire, England
- Sep 7 Gabriel Milito, Argentine soccer defender (42 caps; Independiente, Zaragoza), born in Bernal, Argentina
- Sep 7 Javad Nekounam, Iranian soccer midfielder (151 caps; Pas, Osasuna), born in Rey, Iran
- Sep 7 Mark Prior, American baseball player, coach (Chicago Cubs), born in San Diego, California
- Sep 7 Sara Carrigan, Australian cyclist (Olympic gold, road race 2004), born in Gunnedah, New South Wales
- Sep 8 Teruyuki Moniwa, Japanese footballer, born in Atsugi, Kanagawa, Japan
- Sep 9 Todd Coffey, American baseball player, born in Forest City, North Carolina
Michelle Williams
Sep 9 Michelle Williams, American actress (Dawson's Creek), born in Kalispell, Montana
Michelle Williams
- Sep 10 Timothy Goebel, figure skater (1996 National Jr champ), born in Evanston, Illinois
- Sep 10 [Michael] Mikey Way, American musician (My Chemical Romance), born in Kearny, New Jersey
- Sep 11 Antônio Pizzonia, Brazilian race car driver, born in Manaus, Amazonas, Brazil
- Sep 11 Mike Comrie, Canadian ice hockey player, born in Edmonton, Alberta, Canada
- Sep 12 Fernando César de Souza, Brazilian footballer, born in Jardinopolis, Brazil
- Sep 12 Gus G., Greek guitarist (Firewind, Dream Evil), born in Thessaloniki, Greece
- Sep 12 Sean Burroughs, American baseball player, born in Atlanta, Georgia
- Sep 12 Josef Vašíček, Czech ice hockey player, born in Havlíčkův Brod, Czechoslovakia
- Sep 12 Yao Ming, Chinese basketball player, born in Shanghai
- Sep 13 Ben Savage, American actor (Little Monsters, Wild Palms), born in Chicago, Illinois
- Sep 13 Evangelos Nastos, Greek footballer, born in Thessaloniki, Greece
- Sep 13 Han Chae-young, South Korean actress, born in Daegu, South Korea
- Sep 13 Daisuke Matsuzaka, Japanese baseball player, born in Aomori, Japan
- Sep 13 Michelle Nolan, American musician (Straylight Run), born in Rockville Centre, New York
- Sep 13 Teppei Teranishi, American guitarist (Thrice), born in California
- Sep 15 David Diehl, American football player
- Sep 15 Jolin Tsai, Taiwanese pop singer
- Sep 15 Mike Dunleavy, Jr., American basketball player
- Sep 16 Patrik Štefan, Czech ice hockey player, born in Příbram, Czechoslovakia
- Sep 17 Asashoryu Akinori, Mongolian sumo wrestler (born as Dolgorsuren Dagvador)
- Sep 17 Danny Haren, American baseball player
- Sep 18 Avi Strool, Israeli footballer, born in Tel Aviv, Israel
- Sep 18 Charles Hedger, British musician (Cradle of Filth)
- Sep 18 Chris Tarrant, Australian Rules football player, born in Mildura, Australia
- Sep 19 Sara Quin, Canadian singer and songwriter (Tegan and Sara), born in Calgary, Alberta, Canada
- Sep 19 Tegan Quin, Canadian singer and songwriter (Tegan and Sara), born in Calgary, Alberta, Canada
- Sep 20 Vladimir Karpets, Russian cyclist
- Sep 20 Mariacarla Boscono, Italian fashion model
- Sep 20 Jonathan Le Billon, British actor
- Sep 21 Robert Hoffman, American actor
- Sep 21 Kareena Kapoor, Indian actress (3 Idiots), born in Bombay, India
- Sep 21 Nyree Lewis, British Paralympic swimmer
- Sep 21 Aleksa Palladino, American actress
- Sep 21 Autumn Reeser, American actress
- Sep 21 Tomas Scheckter, South African racing driver
- Sep 22 Fernanda Tavares, Brazilian supermodel
- Sep 23 Cameron Litvack, American television producer
- Sep 24 Petri Pasanen, Finnish footballer, born in Lahti, Findland
- Sep 24 John Arne Riise, Norwegian footballer, born in Molde, Norway
- Sep 24 Daniele Bennati, Italian professional road racing cyclist, born in Arezzo, Italy
- Sep 24 Dean Canto, Australian racing driver (Supercars), born in Sydney, Australia
- Sep 25 T.I. [Clifford Joseph Harris Jr.], American rapper and actor (Bring Em Out, Dead and Gone), born in Atlanta, Georgia
- Sep 26 Patrick Friesacher, Austrian race car driver, born in Wolfsberg, Austria
- Sep 26 Henrik and Daniel Sedin, Swedish ice hockey players, born in Örnsköldsvik, Sweden
- Sep 29 Dallas Green, Canadian musician (Alexisonfire, City and Colour)
- Sep 29 Zachary Levi [Pugh], American actor (Chuck), born in Lake Charles, Louisiana
- Sep 29 Patrick Agyemang, English footballer
Martina Hingis
Sep 30 Martina Hingis, Swiss tennis player (5 Grand Slam singles titles), born in Košice, Slovakia
Martina Hingis
- Sep 30 Camilla D'Errico, Canadian comic book artist and painter
About September 1980
How Old? 40 years old
Generation: Generation X
Leap Year: Yes