| 89971 | August 9 | Event | 1965 – Singapore is expelled from Malaysia and becomes the only country to date to gain independence unwillingly. |
| 89972 | August 9 | Event | 1965 – A fire at a Titan missile base near Searcy, Arkansas kills 53 construction workers. |
| 89973 | August 9 | Event | 1969 – Followers led by Charles Manson murder pregnant actress Sharon Tate (wife of Roman Polanski), coffee heiress Abigail Folger, Polish actor Wojciech Frykowski, men's hairstylist Jay Sebring and recent high-school graduate Steven Parent. |
| 89974 | August 9 | Event | 1971 – The Troubles: The British Army in Northern Ireland launches Operation Demetrius. Hundreds of people are arrested and interned, thousands are displaced, and twenty are killed in the violence that followed. |
| 89975 | August 9 | Event | 1974 – As a direct result of the Watergate scandal, Richard Nixon becomes the first President of the United States to resign from office. His Vice President, Gerald Ford, becomes president. |
| 89976 | August 9 | Event | 1993 – The Liberal Democratic Party of Japan loses a 38-year hold on national leadership. |
| 89977 | August 9 | Event | 1999 – Russian President Boris Yeltsin fires his Prime Minister, Sergei Stepashin, and for the fourth time fires his entire cabinet. |
| 89978 | August 9 | Event | 2006 – At least 21 suspected terrorists were arrested in the 2006 transatlantic aircraft plot that happened in the United Kingdom. The arrests were made in London, Birmingham, and High Wycombe in an overnight operation. |
| 89979 | August 9 | Event | 2013 – Gunmen open fire at a Sunni mosque in the city of Quetta killing at least 10 people and injuring 30. |
| 89980 | August 9 | Event | 2014 – Michael Brown, a 18-year-old African American male in Ferguson, Missouri, was shot and killed by a Ferguson police officer, sparking protests and unrest in the city. |
| 89981 | August 9 | Birth | 1201 – Arnold Fitz Thedmar, English historian and merchant (d. 1274) |
| 89982 | August 9 | Birth | 1537 – Francesco Barozzi, Italian mathematician and astronomer (d. 1604) |
| 89983 | August 9 | Birth | 1544 – Bogislaw XIII, Duke of Pomerania (d. 1606) |
| 89984 | August 9 | Birth | 1603 – Johannes Cocceius, German-Dutch theologian and academic (d. 1669) |
| 89985 | August 9 | Birth | 1631 – John Dryden, English poet, playwright, and critic (d. 1700) |
| 89986 | August 9 | Birth | 1653 – John Oldham, English poet and translator (d. 1683) |
| 89987 | August 9 | Birth | 1669 – Eudoxia Lopukhina, Russian wife of Peter the Great (d. 1731) |
| 89988 | August 9 | Birth | 1674 – František Maxmilián Kaňka, Czech architect, designed the Veltrusy Mansion (d. 1766) |
| 89989 | August 9 | Birth | 1696 – Joseph Wenzel I, Prince of Liechtenstein (d. 1772) |
| 89990 | August 9 | Birth | 1722 – Prince Augustus William of Prussia (d. 1758) |
| 89991 | August 9 | Birth | 1726 – Francesco Cetti, Italian priest, zoologist, and mathematician (d. 1778) |
| 89992 | August 9 | Birth | 1757 – Thomas Telford, Scottish architect and engineer, designed the Menai Suspension Bridge (d. 1834) |
| 89993 | August 9 | Birth | 1776 – Amedeo Avogadro, Italian physicist and chemist (d. 1856) |
| 89994 | August 9 | Birth | 1783 – Grand Duchess Alexandra Pavlovna of Russia (d. 1801) |
| 89995 | August 9 | Birth | 1788 – Adoniram Judson, American missionary and lexicographer (d. 1850) |
| 89996 | August 9 | Birth | 1797 – Charles Robert Malden, English lieutenant and surveyor (d. 1855) |
| 89997 | August 9 | Birth | 1805 – Joseph Locke, English engineer and politician (d. 1860) |
| 89998 | August 9 | Birth | 1845 – André Bessette, Canadian saint (d. 1937) |
| 89999 | August 9 | Birth | 1847 – Maria Vittoria dal Pozzo, French-Italian wife of Amadeo I of Spain (d. 1876) |
| 90000 | August 9 | Birth | 1861 – Dorothea Klumpke, American astronomer and academic (d. 1942) |