- Sep 2 Marcus Ericsson, Swedish Racing Driver
- Sep 5 Kim Yu-Na, Korean figure skater, born in Wonmi-gu, South Korea
- Sep 6 John Wall, American basketball point guard (2010 NBA Draft: #1 pick Washington Wizards), born in Raleigh, North Carolina
- Sep 7 Tanja Kolbe, German ice dancer, born in Berlin, Germany
- Sep 8 Matt Barkley, American NFL football quarterback (Buffalo Bills), born in Newport Beach, California
- Sep 8 Gerrit Cole, American MLB player (NY Yankees), born in Newport Beach, California
- Sep 8 Matthew Dellavedova, Australian basketball player (Cleveland Cavaliers), born in Maryborough, Australia
- Sep 9 Shaun Johnson, New Zealand Rugby League halfback (Auckland Warriors, Cronulla Sharks), born in Auckland, NZ
- Sep 14 Douglas Costa, Brazilian footballer (Juventus), born in Sapucaia do Sul, Brazil
John Tavares
Sep 20 John Tavares, Canadian ice hockey player (New York Islanders), born in Mississauga, Ontario
John Tavares
- Sep 21 Rob Cross, English darts player (PDC World Champion 2018), born in Pembury, England
- Sep 25 Mao Asada, Japanese figure skater, born in Nagoya, Japan
About September 1990
How Old? 31 years old
Generation: Millennial
Leap Year: No