| 104311 | September 12 | Birth | 1980 – Josef Vašíček, Czech ice hockey player (d. 2011) |
| 104312 | September 12 | Birth | 1981 – Marty Adams, Canadian actor and screenwriter |
| 104313 | September 12 | Birth | 1981 – Alan Arruda, Brazilian footballer |
| 104314 | September 12 | Birth | 1981 – Jennifer Hudson, American singer and actress |
| 104315 | September 12 | Birth | 1981 – Staciana Stitts, American swimmer |
| 104316 | September 12 | Birth | 1981 – Hosea Chanchez, American actor |
| 104317 | September 12 | Birth | 1982 – Nana Ozaki, Japanese model |
| 104318 | September 12 | Birth | 1982 – Zoran Planinić, Croatian basketball player |
| 104319 | September 12 | Birth | 1983 – Tom Geißler, German footballer |
| 104320 | September 12 | Birth | 1983 – Rami Haikal, Jordanian guitarist (Bilocate) |
| 104321 | September 12 | Birth | 1983 – Sebastian Hofmann, German footballer |
| 104322 | September 12 | Birth | 1983 – Daniel Muir, American football player |
| 104323 | September 12 | Birth | 1983 – Sergio Parisse, Argentinian-Italian rugby player |
| 104324 | September 12 | Birth | 1983 – Clayton Richard, American baseball player |
| 104325 | September 12 | Birth | 1983 – Carly Smithson, Irish singer-songwriter and actress (We Are the Fallen) |
| 104326 | September 12 | Birth | 1984 – Nashat Akram, Iraqi footballer |
| 104327 | September 12 | Birth | 1984 – Chelsea Carey, Canadian curler |
| 104328 | September 12 | Birth | 1984 – Petra Marklund, Swedish singer-songwriter |
| 104329 | September 12 | Birth | 1985 – Headhunterz, Dutch DJ and producer (Project One) |
| 104330 | September 12 | Birth | 1985 – Burak Aksak, Turkish actor, director, and screenwriter |
| 104331 | September 12 | Birth | 1985 – Jonatan Cerrada, Belgian singer |
| 104332 | September 12 | Birth | 1986 – Alfie Allen, English actor |
| 104333 | September 12 | Birth | 1986 – Kamila Chudzik, Polish heptathlete |
| 104334 | September 12 | Birth | 1986 – Akwasi Fobi-Edusei, English footballer |
| 104335 | September 12 | Birth | 1986 – Joanne Jackson, English swimmer |
| 104336 | September 12 | Birth | 1986 – Yang Mi, Chinese actress and singer |
| 104337 | September 12 | Birth | 1986 – Yuto Nagatomo, Japanese footballer |
| 104338 | September 12 | Birth | 1986 – Dimitrios Regas, Greek sprinter |
| 104339 | September 12 | Birth | 1986 – Emmy Rossum, American singer-songwriter and actress |
| 104340 | September 12 | Birth | 1987 – Yaroslava Shvedova, Kazakhstani tennis player |