| 140281 | December 12 | Birth | 1982 – Ai Kato, Japanese actress |
| 140282 | December 12 | Birth | 1982 – Dmitry Tursunov, Russian tennis player |
| 140283 | December 12 | Birth | 1983 – Katrina Elam, American singer-songwriter |
| 140284 | December 12 | Birth | 1984 – Daniel Agger, Danish footballer |
| 140285 | December 12 | Birth | 1984 – Airi Taira, Japanese actress |
| 140286 | December 12 | Birth | 1984 – Sohail Tanvir, Pakistani cricketer |
| 140287 | December 12 | Birth | 1985 – Pat Calathes, Greek-American basketball player |
| 140288 | December 12 | Birth | 1985 – Giannis Zaradoukas, Greek footballer |
| 140289 | December 12 | Birth | 1986 – Daddy Birori, Rwandan footballer |
| 140290 | December 12 | Birth | 1986 – Përparim Hetemaj, Finnish footballer |
| 140291 | December 12 | Birth | 1986 – Mitsuhiro Hidaka, Japanese singer, rapper, actor, and dancer (AAA) |
| 140292 | December 12 | Birth | 1986 – Nina Kolarič, Slovenian long jumper |
| 140293 | December 12 | Birth | 1986 – Lee Qri, South Korean singer, dancer, and actress (T-ara and QBS) |
| 140294 | December 12 | Birth | 1987 – Marte Eberson, Norwegian keyboardist (Morning Has Occurred and Highasakite) |
| 140295 | December 12 | Birth | 1988 – Hahm Eun-Jung, South Korean singer, dancer, and actress (T-ara and T-ara N4) |
| 140296 | December 12 | Birth | 1989 – Tal, Israeli-French singer-songwriter and dancer |
| 140297 | December 12 | Birth | 1990 – Polat Kemboi Arıkan, Kenyan-Turkish runner |
| 140298 | December 12 | Birth | 1990 – Nixon Chepseba, Kenyan runner |
| 140299 | December 12 | Birth | 1990 – Victor Moses, Nigerian footballer |
| 140300 | December 12 | Birth | 1990 – Seungri, South Korean singer-songwriter, dancer, and actor (Big Bang) |
| 140301 | December 12 | Birth | 1991 – Daniel Magder, Canadian actor |
| 140302 | December 12 | Birth | 1996 – Karen Miyama, Japanese actress |
| 140303 | December 12 | Death | 884 – Carloman II, Frankish king (b. 866) |
| 140304 | December 12 | Death | 1212 – Geoffrey, English archbishop (b. 1152) |
| 140305 | December 12 | Death | 1569 – Philip II, Metropolitan of Moscow (b. 1507) |
| 140306 | December 12 | Death | 1586 – Stephen Báthory, Polish king (b. 1533) |
| 140307 | December 12 | Death | 1685 – John Pell, English mathematician and linguist (b. 1610) |
| 140308 | December 12 | Death | 1736 – Antonina Houbraken, Dutch draughtswoman (b. 1686) |
| 140309 | December 12 | Death | 1751 – Henry St John, 1st Viscount Bolingbroke, English philosopher and politician, Secretary at War (b. 1678) |
| 140310 | December 12 | Death | 1766 – Johann Christoph Gottsched, German philosopher, author, and critic (b. 1700) |