| 140251 | December 12 | Birth | 1971 – Martin Mrva, Slovak chess player |
| 140252 | December 12 | Birth | 1972 – Wilson Kipketer, Kenyan-Danish runner |
| 140253 | December 12 | Birth | 1972 – Georgios Theodoridis, Greek sprinter |
| 140254 | December 12 | Birth | 1972 – Hank Williams III, American singer-songwriter and guitarist (Assjack, Superjoint Ritual, and Arson Anthem) |
| 140255 | December 12 | Birth | 1973 – Gary Breen, English-Irish footballer and manager |
| 140256 | December 12 | Birth | 1973 – Tony Hsieh, American businessman, founded LinkExchange |
| 140257 | December 12 | Birth | 1973 – Walter Otta, Argentinian footballer |
| 140258 | December 12 | Birth | 1974 – Bernard Lagat, Kenyan-American runner |
| 140259 | December 12 | Birth | 1974 – Nolberto Solano, Peruvian footballer and manager |
| 140260 | December 12 | Birth | 1975 – Mayim Bialik, American actress and singer |
| 140261 | December 12 | Birth | 1975 – Wesley Charles, Vincentian footballer |
| 140262 | December 12 | Birth | 1975 – Craig Moore, Australian footballer and manager |
| 140263 | December 12 | Birth | 1975 – Houko Kuwashima, Japanese voice actress and singer |
| 140264 | December 12 | Birth | 1976 – Lloyd Owusu, Ghanaian footballer |
| 140265 | December 12 | Birth | 1976 – Asaka Seto, Japanese actress |
| 140266 | December 12 | Birth | 1977 – Yoel Hernández, Cuban hurdler |
| 140267 | December 12 | Birth | 1977 – Dean Macey, English decathlete and bobsledder |
| 140268 | December 12 | Birth | 1977 – Colin White, Canadian ice hockey player |
| 140269 | December 12 | Birth | 1978 – Monica Bîrlădeanu, Romanian model and actress |
| 140270 | December 12 | Birth | 1978 – Jennifer Rovero, American model |
| 140271 | December 12 | Birth | 1979 – Carlos Agassi, Filipino actor, host, singer, and rapper |
| 140272 | December 12 | Birth | 1979 – John Salmons, American basketball player |
| 140273 | December 12 | Birth | 1980 – Dejene Berhanu, Ethiopian runner (d. 2010) |
| 140274 | December 12 | Birth | 1980 – Gus G, Greek guitarist and songwriter (Firewind, Mystic Prophecy, and Dream Evil) |
| 140275 | December 12 | Birth | 1980 – Dorin Goian, Romanian footballer |
| 140276 | December 12 | Birth | 1981 – Jeret Peterson, American skier (d. 2011) |
| 140277 | December 12 | Birth | 1981 – Pedro Ríos, Spanish footballer |
| 140278 | December 12 | Birth | 1981 – Yuvraj Singh, Indian cricketer |
| 140279 | December 12 | Birth | 1981 – Stephen Warnock, English footballer |
| 140280 | December 12 | Birth | 1982 – Lim Jae-duk, South Korean gamer |