| 86551 | July 31 | Birth | 1989 – Jessica Williams, American actress |
| 86552 | July 31 | Birth | 1989 – Zelda Williams, American actress |
| 86553 | July 31 | Birth | 1990 – Mirela, Spanish singer |
| 86554 | July 31 | Birth | 1990 – Besart Abdurahimi, Croatian footballer |
| 86555 | July 31 | Birth | 1991 – Réka-Luca Jani, Hungarian tennis player |
| 86556 | July 31 | Birth | 1992 – Lizzy, South Korean singer, dancer, and actress (After School and Orange Caramel) |
| 86557 | July 31 | Birth | 1992 – José Fernández, Cuban baseball player |
| 86558 | July 31 | Birth | 1992 – Ryan Johansen, Canadian ice hockey player |
| 86559 | July 31 | Birth | 1992 – Kyle Larson, American race car driver |
| 86560 | July 31 | Birth | 1993 – Christian Byers, Australian actor |
| 86561 | July 31 | Birth | 1996 – Blake Michael, American actor, director, and producer |
| 86562 | July 31 | Birth | 1997 – Barbie Forteza, Filipino actress and singer |
| 86563 | July 31 | Birth | 1998 – Rico Rodriguez, American actor |
| 86564 | July 31 | Death | 54 BC – Aurelia Cotta, Roman mother of Gaius Julius Caesar (b. 120 BC) |
| 86565 | July 31 | Death | 450 – Peter Chrysologus, Italian bishop and saint (b. 380) |
| 86566 | July 31 | Death | 1358 – Étienne Marcel, French rebel leader (b. 1302) |
| 86567 | July 31 | Death | 1396 – William Courtenay, English archbishop and politician, Lord Chancellor of the United Kingdom (b. 1342) |
| 86568 | July 31 | Death | 1508 – Na'od, Ethiopian emperor (b. 1494) |
| 86569 | July 31 | Death | 1556 – Ignatius of Loyola, Spanish priest and theologian, founded the Society of Jesus (b. 1491) |
| 86570 | July 31 | Death | 1653 – Thomas Dudley, English-American soldier and politician, 3rd Governor of Massachusetts Bay Colony (b. 1576) |
| 86571 | July 31 | Death | 1726 – Nicolaus II Bernoulli, Swiss mathematician and theorist (b. 1695) |
| 86572 | July 31 | Death | 1750 – John V of Portugal (b. 1689) |
| 86573 | July 31 | Death | 1762 – Luis Vicente de Velasco e Isla Spanish sailor and commander (b. 1711) |
| 86574 | July 31 | Death | 1784 – Denis Diderot, French philosopher and critic (b. 1713) |
| 86575 | July 31 | Death | 1805 – Dheeran Chinnamalai, Indian soldier (b. 1756) |
| 86576 | July 31 | Death | 1864 – Louis Christophe François Hachette, French publisher (b. 1800) |
| 86577 | July 31 | Death | 1875 – Andrew Johnson, American general and politician, 17th President of the United States (b. 1808) |
| 86578 | July 31 | Death | 1884 – Kiến Phúc, Vietnamese emperor (b. 1869) |
| 86579 | July 31 | Death | 1886 – Franz Liszt, Hungarian pianist, composer, and conductor (b. 1811) |
| 86580 | July 31 | Death | 1914 – Jean Jaurès, French journalist and politician (b. 1859) |