| 102691 | September 9 | Event | 1948 – Kim Il-sung declares the establishment of the Democratic People's Republic of Korea. |
| 102692 | September 9 | Event | 1956 – Elvis Presley appears on The Ed Sullivan Show for the first time. |
| 102693 | September 9 | Event | 1965 – The United States Department of Housing and Urban Development is established. |
| 102694 | September 9 | Event | 1965 – Hurricane Betsy makes its second landfall near New Orleans, leaving 76 dead and $1.42 billion ($10–12 billion in 2005 dollars) in damages, becoming the first hurricane to cause over $1 billion in unadjusted damage. |
| 102695 | September 9 | Event | 1966 – The National Traffic and Motor Vehicle Safety Act is signed into law by U.S. President Lyndon B. Johnson. |
| 102696 | September 9 | Event | 1969 – Allegheny Airlines Flight 853 DC-9 collides in flight with a Piper PA-28 and crashes near Fairland, Indiana. |
| 102697 | September 9 | Event | 1969 – In Canada, the Official Languages Act comes into force, making French equal to English throughout the Federal government. |
| 102698 | September 9 | Event | 1970 – A British airliner is hijacked by the Popular Front for the Liberation of Palestine and flown to Dawson's Field in Jordan. |
| 102699 | September 9 | Event | 1971 – The four-day Attica Prison riot begins, eventually resulting in 39 dead, most killed by state troopers retaking the prison. |
| 102700 | September 9 | Event | 1972 – In Kentucky's Mammoth Cave National Park, a Cave Research Foundation exploration and mapping team discovers a link between the Mammoth and Flint Ridge cave systems, making it the longest known cave passageway in the world. |
| 102701 | September 9 | Event | 1990 – Batticaloa massacre: Massacre of 184 minority Tamil civilians by Sri Lankan Army in the eastern Batticaloa District of Sri Lanka. |
| 102702 | September 9 | Event | 1991 – Tajikistan declares independence from the Soviet Union. |
| 102703 | September 9 | Event | 1993 – The Palestine Liberation Organization officially recognizes Israel as a legitimate state. |
| 102704 | September 9 | Event | 1999 – Sega releases the first 128-bit video game console, the Dreamcast. |
| 102705 | September 9 | Event | 2001 – Ahmad Shah Massoud, leader of the Northern Alliance, is assassinated in Afghanistan by two al-Qaeda assassins who claimed to be Arab journalists wanting an interview. |
| 102706 | September 9 | Event | 2001 – Pärnu methanol tragedy occurs in Pärnu County, Estonia. |
| 102707 | September 9 | Event | 2001 – The Unix billennium is reached, marking the beginning of the use of 10-digit decimal Unix time stamps. |
| 102708 | September 9 | Event | 2009 – The Dubai Metro, the first urban train network in the Arabian Peninsula, is ceremonially inaugurated. |
| 102709 | September 9 | Event | 2012 – The Indian space agency puts into orbit its heaviest foreign satellite yet, in a streak of 21 consecutive successful PLSV launches. |
| 102710 | September 9 | Event | 2012 – A wave of attacks kill more than 100 people and injure 350 others across Iraq. |
| 102711 | September 9 | Event | 2015 – Elizabeth II became the longest reigning monarch of the United Kingdom. |
| 102712 | September 9 | Birth | 214 – Aurelian, Roman emperor (d. 275) |
| 102713 | September 9 | Birth | 384 – Honorius, Roman emperor (d. 423) |
| 102714 | September 9 | Birth | 1349 – Albert III, Duke of Austria (d. 1395) |
| 102715 | September 9 | Birth | 1427 – Thomas de Ros, 9th Baron de Ros, English soldier and politician (d. 1464) |
| 102716 | September 9 | Birth | 1466 – Ashikaga Yoshitane, Japanese shogun (d. 1523) |
| 102717 | September 9 | Birth | 1558 – Philippe Emmanuel, Duke of Mercœur (d. 1602) |
| 102718 | September 9 | Birth | 1585 – Cardinal Richelieu, French cardinal and politician (d. 1642) |
| 102719 | September 9 | Birth | 1629 – Cornelis Tromp, Dutch general (d. 1691) |
| 102720 | September 9 | Birth | 1700 – Princess Anna Sophie of Schwarzburg-Rudolstadt (d. 1780) |