| 91231 | August 12 | Birth | 1941 – Réjean Ducharme, Canadian author and playwright |
| 91232 | August 12 | Birth | 1941 – Dana Ivey, American actress |
| 91233 | August 12 | Birth | 1941 – Deborah Walley, American actress and singer (d. 2001) |
| 91234 | August 12 | Birth | 1942 – Hans-Wilhelm Müller-Wohlfahrt, German physician and author |
| 91235 | August 12 | Birth | 1943 – Deborah Walley, American actress and singer (d. 2001) |
| 91236 | August 12 | Birth | 1945 – Dorothy E. Denning, American computer scientist and academic |
| 91237 | August 12 | Birth | 1945 – Ron Mael, American keyboard player and songwriter (Sparks and Halfnelson) |
| 91238 | August 12 | Birth | 1946 – Terry Nutkins, English television host and author (d. 2012) |
| 91239 | August 12 | Birth | 1948 – Siddaramaiah, Indian lawyer and politician, 22nd Chief Minister of Karnataka |
| 91240 | August 12 | Birth | 1948 – Sue Monk Kidd, American nurse, author, and educator |
| 91241 | August 12 | Birth | 1948 – Graham J. Zellick, English academic and jurist |
| 91242 | August 12 | Birth | 1949 – Panagiotis Chinofotis, Greek admiral and politician |
| 91243 | August 12 | Birth | 1949 – Mark Knopfler, Scottish-English singer-songwriter, guitarist, and producer (Dire Straits and The Notting Hillbillies) |
| 91244 | August 12 | Birth | 1949 – Lou Martin, Northern Irish pianist, songwriter, and producer (d. 2012) |
| 91245 | August 12 | Birth | 1949 – Alex Naumik, Lithuanian-Norwegian singer-songwriter and producer (d. 2013) |
| 91246 | August 12 | Birth | 1949 – Rick Ridgeway, American mountaineer and photographer |
| 91247 | August 12 | Birth | 1950 – Jim Beaver, American actor, director, and screenwriter |
| 91248 | August 12 | Birth | 1951 – Willie Horton, American murderer |
| 91249 | August 12 | Birth | 1952 – Chen Kaige, Chinese actor, director, and screenwriter |
| 91250 | August 12 | Birth | 1952 – Kalevi Kull, Estonian biologist and academic |
| 91251 | August 12 | Birth | 1954 – Leung Chun-ying, Hong Kong businessman and politician, 3rd Chief Executive of Hong Kong |
| 91252 | August 12 | Birth | 1954 – Ibolya Dávid, Hungarian lawyer and politician, Minister of Justice of Hungary |
| 91253 | August 12 | Birth | 1954 – François Hollande, French lawyer and politician, 24th President of France |
| 91254 | August 12 | Birth | 1954 – Sam J. Jones, American actor |
| 91255 | August 12 | Birth | 1954 – Pat Metheny, American guitarist and songwriter (Pat Metheny Group) |
| 91256 | August 12 | Birth | 1955 – Ann M. Martin, American author |
| 91257 | August 12 | Birth | 1955 – Heintje Simons, Dutch singer and actor |
| 91258 | August 12 | Birth | 1955 – Terry Taylor, American wrestler and trainer |
| 91259 | August 12 | Birth | 1956 – Lee Freedman, Australian horse trainer |
| 91260 | August 12 | Birth | 1956 – Bruce Greenwood, Canadian actor and producer |