| 12481 | January 31 | Birth | 1971 – Patricia Velásquez, Venezuelan model, actress, and producer |
| 12482 | January 31 | Birth | 1971 – Lee Young-ae, South Korean actress |
| 12483 | January 31 | Birth | 1973 – Portia de Rossi, Australian-American actress |
| 12484 | January 31 | Birth | 1974 – Wil Anderson, Australian comedian and radio host |
| 12485 | January 31 | Birth | 1974 – Othella Harrington, American basketball player and coach |
| 12486 | January 31 | Birth | 1974 – Ariel Pestano, Cuban baseball player |
| 12487 | January 31 | Birth | 1975 – Fred Coleman, American football player and coach |
| 12488 | January 31 | Birth | 1975 – Jackie O, Australian radio and television host |
| 12489 | January 31 | Birth | 1975 – Preity Zinta, Indian actress |
| 12490 | January 31 | Birth | 1976 – Traianos Dellas, Greek footballer and manager |
| 12491 | January 31 | Birth | 1976 – Buddy Rice, American race car driver |
| 12492 | January 31 | Birth | 1976 – Paul Scheer, American comedian, actor, producer, and screenwriter |
| 12493 | January 31 | Birth | 1977 – Shingo Katori, Japanese singer and actor |
| 12494 | January 31 | Birth | 1977 – Jim Kleinsasser, American football player |
| 12495 | January 31 | Birth | 1977 – Bobby Moynihan, American actor |
| 12496 | January 31 | Birth | 1977 – Sergei Pareiko, Estonian footballer |
| 12497 | January 31 | Birth | 1977 – Katherine Shindle, American actress, singer, and dancer |
| 12498 | January 31 | Birth | 1977 – Kerry Washington, American actress |
| 12499 | January 31 | Birth | 1978 – Fabián Caballero, Argentinian footballer and manager |
| 12500 | January 31 | Birth | 1978 – Brad Rutter, American game show contestant highest winning champion in Jeopardy! history |
| 12501 | January 31 | Birth | 1978 – Ellen Stagg, American photographer |
| 12502 | January 31 | Birth | 1978 – Arthur Wellesley, Marquess of Douro |
| 12503 | January 31 | Birth | 1979 – Daniel Tammet, English author and educator |
| 12504 | January 31 | Birth | 1979 – Emmett J. Scanlan, Irish actor and producer |
| 12505 | January 31 | Birth | 1980 – James Adomian, American comedian, actor, and screenwriter |
| 12506 | January 31 | Birth | 1980 – Tiffany Limos, American actress |
| 12507 | January 31 | Birth | 1981 – Julio Arca, Argentinian footballer |
| 12508 | January 31 | Birth | 1981 – Amrita Arora, Indian actress |
| 12509 | January 31 | Birth | 1981 – Justin Timberlake, American singer-songwriter, dancer, and actor |
| 12510 | January 31 | Birth | 1982 – Maret Ani, Estonian tennis player |