September 11 is the 254th day of the year (255th in leap years) in the Gregorian calendar; 111 days remain until the end of the year.

Between the years AD 1900 and 2099, September 11 of the Gregorian calendar is the leap day of the Coptic and Ethiopian calendars. These leap days occur in the years immediately before those which are leap years in the Julian and Gregorian calendars. In all common years of the Coptic and Ethiopian calendars, September 11 is New Year's Day.

• 1185 – Isaac II Angelos kills Stephen Hagiochristophorites and then appeals to the people, resulting in the revolt that deposes Andronikos I Komnenos and places Isaac on the throne of the Byzantine Empire.
• 1226 – The Roman Catholic practice of public adoration of the Blessed Sacrament outside of Mass spreads from monasteries to parishes.
• 1297 – Battle of Stirling Bridge: Scots jointly-led by William Wallace and Andrew Moray defeat the English.
• 1390 – Lithuanian Civil War (1389–92): The Teutonic Knights begin a five-week siege of Vilnius.
• 1541 – Santiago, Chile, is destroyed by indigenous warriors, led by Michimalonco.
• 1565 – Ottoman forces retreat from Malta ending the Great Siege of Malta.
• 1609 – Henry Hudson discovers Manhattan Island and the indigenous people living there.
• 1649 – Siege of Drogheda ends: Oliver Cromwell's English Parliamentarian troops take the town and execute its garrison.
• 1697 – Battle of Zenta: a major engagement in the Great Turkish War (1683–1699) and one of the most decisive defeats in Ottoman history.
• 1708 – Charles XII of Sweden stops his march to conquer Moscow outside Smolensk, marking the turning point in the Great Northern War. The army is defeated nine months later in the Battle of Poltava, and the Swedish Empire ceases to be a major power.
• 1709 – Battle of Malplaquet: Great Britain, Netherlands and Austria fight against France.
• 1714 – Siege of Barcelona: Barcelona, capital city of Catalonia, surrenders to Spanish and French Bourbon armies in the War of the Spanish Succession.
• 1758 – Battle of Saint Cast: France repels British invasion during the Seven Years' War.
• 1775 – Benedict Arnold's expedition to Quebec leaves Cambridge, Massachusetts.
• 1776 – British–American peace conference on Staten Island fails to stop nascent American Revolutionary War.
• 1777 – American Revolutionary War: Battle of Brandywine: The British celebrate a major victory in Chester County, Pennsylvania.
• 1786 – The beginning of the Annapolis Convention.
• 1789 – Alexander Hamilton is appointed the first United States Secretary of the Treasury.
• 1792 – The Hope Diamond is stolen along with other French crown jewels when six men break into the house where they are stored.
• 1800 – The Maltese National Congress Battalions are disbanded by British Civil Commissioner Alexander Ball.
• 1802 – France annexes the Kingdom of Piedmont.
• 1803 – Battle of Delhi, during the Second Anglo-Maratha War, between British troops under General Lake, and Marathas of Scindia's army under General Louis Bourquin.
• 1813 – War of 1812: British troops arrive in Mount Vernon and prepare to march to and invade Washington, D.C..
• 1814 – War of 1812: The climax of the Battle of Plattsburgh, a major United States victory in the war.
• 1826 – Captain William Morgan, an ex-freemason is arrested in Batavia, New York for debt after declaring that he would publish The Mysteries of Free Masonry, a book against Freemasonry. This sets into motion the events that lead to his mysterious disappearance.
• 1829 – Surrender of the expedition led by Isidro Barradas at Tampico, sent by the Spanish crown in order to retake Mexico. This was the consummation of Mexico's campaign for independence.
• 1830 – Anti-Masonic Party convention; one of the first American political party conventions.
• 1836 – The Riograndense Republic is proclaimed by rebels after defeating Empire of Brazil's troops in the Battle of Seival, during the Ragamuffin War.
• 1851 – Christiana Resistance: Escaped slaves stand against their former owner in armed resistance in Christiana, Pennsylvania, creating a rallying cry for the abolitionist movement.
• 1852 – The State of Buenos Aires secedes from the Argentine Federal government, rejoining on September 17, 1861. Several places are named Once de Septiembre after this event.
• 1857 – The Mountain Meadows massacre: Mormon settlers and Paiutes massacre 120 pioneers at Mountain Meadows, Utah.
• 1865 – Alpha Tau Omega is founded at the Virginia Military Institute.
• 1897 – After months of pursuit, generals of Menelik II of Ethiopia capture Gaki Sherocho, the last king of Kaffa, bringing an end to that ancient kingdom.
• 1903 – The first race at the Milwaukee Mile in West Allis, Wisconsin is held. It is the oldest major speedway in the world.
• 1905 – The Ninth Avenue derailment occurs in New York City, killing 13.
• 1914 – Australia invades New Britain, defeating a German contingent at the Battle of Bita Paka.
• 1916 – The Quebec Bridge's central span collapses, killing 11 men. The bridge previously collapsed completely on August 29, 1907.
• 1919 – United States Marine Corps invades Honduras.
• 1921 – Nahalal, the first moshav in Palestine, is settled as part of a Zionist plan to colonize Palestine and creating a Jewish state, later to be Israel.
• 1922 – The Treaty of Kars is ratified in Yerevan, Armenia.
• 1922 – The Sun News-Pictorial is founded in Melbourne, Australia.
• 1939 – World War II: Canada declares war on Germany, the country's first independent declaration of war
• 1940 – George Stibitz performs the first remote operation of a computer.
• 1941 – Charles Lindbergh's Des Moines Speech accusing the British, Jews and FDR's administration of pressing for war with Germany.
• 1943 – World War II: German troops occupy Corsica and Kosovo-Metohija ending the Italian occupation of Corsica.
• 1943 – World War II: Start of the Nazi liquidation of the Minsk and Lida ghettos.
• 1944 – World War II: The Western Allied invasion of Germany begins near the city of Aachen.
• 1944 – World War II: RAF bombing raid on Darmstadt and the following firestorm kill 11,500.
• 1945 – World War II: Australian 9th Division forces liberate the Japanese-run Batu Lintang camp, a POW and civilian internment camp on the island of Borneo.
• 1950 – Korean War: President Harry S. Truman approved military operations north of the 38^th parallel.
• 1954 – Hurricane Edna hits New England as a Category 2 hurricane, causing significant damage and 29 deaths.
• 1961 – Hurricane Carla strikes the Texas coast as a Category 4 hurricane, the second strongest storm ever to hit the state.
• 1965 – Indo-Pakistani War: The Indian Army captures the town of Burki, just southeast of Lahore.
• 1968 – Air France Flight 1611 crashes off Nice, France, killing 89 passengers and six crew.
• 1970 – The Dawson's Field hijackers release 88 of their hostages. The remaining hostages, mostly Jews and Israeli citizens, are held until September 25.
• 1971 – The Egyptian Constitution becomes official.
• 1972 – The San Francisco Bay Area Rapid Transit system begins passenger service.
• 1973 – A coup in Chile headed by General Augusto Pinochet topples the democratically elected president Salvador Allende. Pinochet exercises dictatorial power until ousted in a referendum in 1988, staying in power until 1990.
• 1974 – Eastern Air Lines Flight 212 crashes in Charlotte, North Carolina, killing 69 passengers and two crew.
• 1976 – A bomb planted by a Croatian terrorist, Zvonko Bušić, is found at New York's Grand Central Terminal; one NYPD officer is killed trying to defuse it.
• 1980 – Voters approve a new Constitution of Chile, later amended after the departure of President Pinochet.
• 1982 – The international forces that were guaranteeing the safety of Palestinian refugees following Israel's 1982 Invasion of Lebanon leave Beirut. Five days later, several thousand refugees are massacred in the Sabra and Shatila refugee camps by Phalange forces.
• 1985 – Pete Rose breaks Ty Cobb's baseball record for most career hits with his 4,192nd hit.
• 1989 – Hungary announces that the East German refugees who had been housed in temporary camps were free to leave for West Germany.
• 1992 – Hurricane Iniki, one of the most damaging hurricanes in United States history, devastates the Hawaiian islands of Kauai and Oahu.
• 1997 – NASA's Mars Global Surveyor reaches Mars.
• 1997 – After a nationwide referendum, Scotland votes to establish a devolved parliament within the United Kingdom.
• 2001 – Two hijacked aircraft crash into the World Trade Center in New York City, while a third smashes into The Pentagon in Arlington County, Virginia, and a fourth into a field near Shanksville, Pennsylvania, in a series of coordinated suicide attacks by 19 members of al-Qaeda. A total of 2,996 people are killed.
• 2007 – Russia tests the largest conventional weapon ever, the Father of All Bombs.
• 2007 – West Indian batsman Chris Gayle becomes the first person to hit a century in Twenty20 International cricket.
• 2008 – A major Channel Tunnel fire broke out on a freight train, resulting in the closure of part of the tunnel for 6 months.
• 2012 – A total of 315 people are killed in two garment factory fires in Pakistan.
• 2012 – The U.S. embassy in Benghazi, Libya is attacked, resulting in four deaths.
• 2015 – A crane collapses onto the Masjid al-Haram mosque in Saudi Arabia, killing 111 people and injuring 394 others.

• 600 – Yuknoom Ch'een II, Mayan ruler
• 1182 – Minamoto no Yoriie, Japanese shogun (d. 1204)
• 1318 – Eleanor of Lancaster, countess of Arundel (d. 1372)
• 1465 – Bernardo Accolti, Italian poet (d. 1536)
• 1470 – Martin Waldseemüller, German mapmaker (d. 1520)
• 1476 – Louise of Savoy (d. 1531)
• 1494 – Elisabeth of Brunswick-Lüneburg, Duchess of Guelders (1518–1538) (d. 1572)
• 1522 – Ulisse Aldrovandi, Italian ornithologist and botanist (d. 1605)
• 1524 – Pierre de Ronsard, French poet and author (d. 1585)
• 1525 – John George, Elector of Brandenburg (d. 1598)
• 1557 – Joseph Calasanz, Spanish priest and founder of Piarists (d. 1648)
• 1572 – Daniyal, Imperial Prince of the Royal House of Timur (d. 1604)
• 1578 – Vincenzo Maculani, Catholic cardinal (d. 1667)
• 1611 – Henri de la Tour d'Auvergne, Vicomte de Turenne, French general (d. 1675)
• 1681 – Johann Gottlieb Heineccius, German academic and jurist (d. 1741)
• 1700 – James Thomson, Scottish poet and playwright (d. 1748)
• 1711 – William Boyce, English organist and composer (d. 1779)
• 1723 – Johann Bernhard Basedow, German author and educator (d. 1790)
• 1751 – Princess Charlotte of Saxe-Meiningen (d. 1827)
• 1764 – Valentino Fioravanti, Italian organist and composer (d. 1837)
• 1771 – Mungo Park, Scottish surgeon and explorer (d. 1806)
• 1786 – Friedrich Kuhlau, German-Danish pianist and composer (d. 1832)
• 1798 – Franz Ernst Neumann, German mineralogist and physicist (d. 1895)
• 1800 – Daniel S. Dickinson, American lawyer and politician, 13th Lieutenant Governor of New York (d. 1866)
• 1816 – Carl Zeiss, German lens maker, created the Optical instrument (d. 1888)
• 1825 – Eduard Hanslick, Bohemian-Austrian musicologist and critic (d. 1904)
• 1829 – Thomas Hill, American painter (d. 1908)
• 1836 – Fitz Hugh Ludlow, American journalist, author, and explorer (d. 1870)
• 1838 – John Ireland, Irish-American archbishop (d. 1918)
• 1847 – Mary Watson Whitney, American astronomer and academic (d. 1921)
• 1859 – Vjenceslav Novak, Croatian author and playwright (d. 1905)
• 1860 – James Allan, New Zealand rugby player (d. 1934)
• 1861 – Juhani Aho, Finnish author and journalist (d. 1921)
• 1862 – Julian Byng, 1st Viscount Byng of Vimy, English field marshal and politician, 12th Governor General of Canada (d. 1935)
• 1862 – Hawley Harvey Crippen, American physician (d. 1910)
• 1862 – O. Henry, American short story writer (d. 1910)
• 1865 – Rainis, Latvian poet and playwright (d. 1929)
• 1871 – Scipione Borghese, 10th Prince of Sulmona, Italian race car driver, mountaineer, and politician (d. 1927)
• 1876 – Stan Rowley, Australian sprinter (d. 1924)
• 1877 – Felix Dzerzhinsky, Polish-Russian academic and politician (d. 1926)
• 1877 – James Hopwood Jeans, English physicist, astronomer, and mathematician (d. 1946)
• 1879 – Louis Coatalen, French engineer (d. 1962)
• 1884 – Sudhamoy Pramanick, Indian activist and politician (d. 1974)
• 1885 – D. H. Lawrence, English novelist, poet, playwright, and critic (d. 1930)
• 1885 – Herbert Stothart, American composer and conductor (d. 1949)
• 1891 – William Thomas Walsh, American historian, author, and educator (d. 1949)
• 1893 – Douglas Hawkes, English-Greek race car driver and engineer (d. 1974)
• 1895 – Vinoba Bhave, Indian philosopher and Gandian, Bharat Ratna Awardee (d. 1982)
• 1898 – Gerald Templer, English field marshal and politician, British High Commissioner in Malaya (d. 1979)
• 1899 – Philipp Bouhler, German politician (d. 1945)
• 1899 – Jimmie Davis, American singer-songwriter and politician, 47th Governor of Louisiana (d. 2000)
• 1899 – Anton Koolmann, Estonian wrestler and coach (d. 1953)
• 1900 – D. W. Brooks, American farmer and businessman, founded Gold Kist (d. 1999)
• 1903 – Theodor Adorno, German sociologist and philosopher (d. 1969)
• 1903 – Stephen Etnier, American lieutenant and painter (d. 1984)
• 1904 – Karl Plutus, Estonian lawyer and jurist (d. 2010)
• 1907 – Lev Oborin, Russian pianist and educator (d. 1974)
• 1908 – Alvar Lidell, English journalist (d. 1981)
• 1911 – Lala Amarnath, Indian cricketer (d. 2000)
• 1911 – Bola de Nieve, Cuban singer-songwriter and pianist (d. 1971)
• 1913 – Bear Bryant, American football player and coach (d. 1983)
• 1913 – Jacinto Convit, Venezuelan physician and academic (d. 2014)
• 1914 – Serbian Patriarch Pavle II (d. 2009)
• 1916 – Ed Sabol, American film producer, co-founded NFL Films (d. 2015)
• 1917 – Donald Blakeslee, American colonel and pilot (d. 2008)
• 1917 – Herbert Lom, Czech-born English actor (d. 2012)
• 1917 – Ferdinand Marcos, Filipino soldier, lawyer, and politician, 10th President of the Philippines (d. 1989)
• 1917 – Jessica Mitford, English-American journalist and author (d. 1996)
• 1917 – Daniel Wildenstein, French art dealer and horse breeder (d. 2001)
• 1921 – Leaford Bearskin, American tribal leader and colonel (d. 2012)
• 1921 – Edwin Richfield, English actor and screenwriter (d. 1990)
• 1923 – Betsy Drake, American actress (d. 2015)
• 1923 – Vasilije Mokranjac, Serbian composer and academic (d. 1984)
• 1924 – Daniel Akaka, American soldier, engineer, and politician
• 1924 – Tom Landry, American football player and coach (d. 2000)
• 1924 – Rudolf Vrba, Czech-Canadian pharmacologist and educator (d. 2006)
• 1925 – Harry Somers, Canadian soldier and composer (d. 1999)
• 1926 – Eddie Miksis, American baseball player (d. 2005)
• 1927 – G. David Schine, American soldier and businessman (d. 1996)
• 1928 – Reubin Askew, American sergeant, lawyer, and politician, 37th Governor of Florida (d. 2014)
• 1928 – Earl Holliman, American actor
• 1928 – William X. Kienzle, American priest and author (d. 2001)
• 1929 – Luis García, Venezuelan baseball player and manager (d. 2014)
• 1929 – Primož Kozak, Slovenian playwright (d. 1981)
• 1929 – Patrick Mayhew, English lawyer and politician, Secretary of State for Northern Ireland
• 1930 – Cathryn Damon, American actress and dancer (d. 1987)
• 1930 – Jean-Claude Forest, French author and illustrator (d. 1998)
• 1930 – Saleh Selim, Egyptian footballer, manager, and actor (d. 2002)
• 1931 – John Reger, American football player (d. 2013)
• 1931 – Hans-Ulrich Wehler, German historian and academic (d. 2014)
• 1932 – Peter Anderson, English footballer
• 1932 – Bob Packwood, American politician
• 1933 – Margaret Booth, English lawyer and judge
• 1933 – William Luther Pierce, American author and activist (d. 2002)
• 1933 – Nicola Pietrangeli, Italian tennis player
• 1934 – Oliver Jones, Canadian pianist and composer
• 1935 – Arvo Pärt, Estonian composer
• 1935 – Gherman Titov, Russian general, pilot, and astronaut (d. 2000)
• 1936 – Pavel Landovský, Czech actor, director, and playwright (d. 2014)
• 1937 – Robert Crippen, American captain, pilot, and astronaut
• 1937 – Queen Paola of Belgium
• 1938 – David Higgins, English composer and conductor (d. 2006)
• 1938 – Brian F. G. Johnson, English chemist and academic
• 1939 – Charles Geschke, American businessman, co-founded Adobe Systems
• 1940 – Brian De Palma, American director, producer, and screenwriter
• 1940 – Nông Đức Mạnh, Vietnamese politician
• 1940 – Thomas K. McCraw, American historian and author (d. 2012)
• 1940 – Theodore Olson, American lawyer and politician, United States Solicitor General
• 1940 – Robert Palmer, American businessman, co-founded Mostek
• 1942 – Lola Falana, American actress, singer, and dancer
• 1943 – André Caillé, Canadian chemist and businessman
• 1943 – Jack Ely, American singer and guitarist (d. 2015)
• 1943 – Brian Perkins, New Zealand-English journalist and actor
• 1944 – Everaldo, Brazilian footballer (d. 1974)
• 1944 – Freddy Thielemans, Belgian educator and politician, Mayor of Brussels
• 1945 – Franz Beckenbauer, German footballer and manager
• 1945 – Gianluigi Gelmetti, Italian composer and conductor
• 1946 – Anthony Browne, English author and illustrator
• 1946 – John Roberts, Welsh footballer and manager (d. 2016)
• 1946 – Jim Shoulder, English footballer and manager
• 1946 – Dennis Tufano, American rock singer
• 1948 – John Martyn, English-Scottish singer-songwriter and guitarist (d. 2009)
• 1949 – Roger Uttley, English rugby player and coach
• 1949 – Bill Whittington, American race car driver
• 1950 – Anne Dell, Australian biochemist and academic
• 1950 – Bruce Doull, Australian footballer
• 1950 – Amy Madigan, American actress
• 1950 – Barry Sheene, English motorcycle racer and sportscaster (d. 2003)
• 1951 – Miroslav Dvořák, Czech ice hockey player (d. 2008)
• 1951 – Richard D. Gill, English-Dutch mathematician and academic
• 1951 – Hugo Porta, Argentinian rugby player
• 1952 – Catherine Bott, English soprano
• 1953 – Jani Allan, English-South African journalist and author
• 1953 – Renée Geyer, Australian singer-songwriter
• 1953 – Tommy Shaw, American singer-songwriter and guitarist
• 1955 – Sharon Lamb, American psychologist and academic
• 1956 – Tony Gilroy, American director, producer, and screenwriter
• 1957 – Jon Moss, English drummer
• 1957 – Jeff Sluman, American golfer
• 1957 – Jeh Johnson, American political appointee; Secretary of the U.S. Department of Homeland Security
• 1958 – Brad Lesley, American baseball player (d. 2013)
• 1958 – Scott Patterson, American baseball player
• 1958 – Phoef Sutton, American screenwriter and producer
• 1959 – Andre Dubus III, American novelist and short story writer
• 1959 – David Frost, South African golfer
• 1959 – Robert Wrenn, American golfer and sportscaster
• 1960 – Hiroshi Amano, Japanese physicist and academic, Nobel Prize laureate
• 1960 – Michael P. Leavitt, American soldier
• 1961 – Philip Ardagh, English author
• 1961 – Elizabeth Daily, American actress
• 1961 – Virginia Madsen, American actress
• 1961 – Samina Raja, Pakistani poet and educator (d. 2012)
• 1962 – Filip Dewinter, Belgian politician
• 1962 – Kristy McNichol, American actress
• 1962 – Victoria Poleva, Ukrainian pianist and composer
• 1962 – Julio Salinas, Spanish footballer
• 1962 – Jenny Sanford, American banker and businesswoman
• 1963 – Dave Bidini, Canadian singer-songwriter and guitarist
• 1964 – Ellis Burks, American baseball player and manager
• 1965 – Bashar al-Assad, Syrian marshal and politician, 21st President of Syria
• 1965 – Paul Heyman, American wrestling promoter, manager, and journalist
• 1965 – Moby, American singer-songwriter, musician and DJ
• 1967 – Maria Bartiromo, American financial journalist and television personality
• 1967 – Harry Connick Jr., American singer-songwriter, pianist, actor, and talk show host
• 1967 – Sung Jae-gi, South Korean activist, founded Man of Korea (d. 2013)
• 1967 – Charles Walker, English politician
• 1968 – Allan Alaküla, Estonian journalist
• 1968 – Paul Mayeda Berges, American director and screenwriter
• 1969 – Stefano Cagol, Italian photographer and director
• 1969 – Eduardo Pérez, American baseball player, manager, and sportscaster
• 1970 – Taraji P. Henson, American actress
• 1970 – William Joppy, American boxer and coach
• 1970 – Ted Leo, American singer-songwriter and guitarist
• 1971 – Richard Ashcroft, English singer-songwriter and musician
• 1971 – Markos Moulitsas, American soldier, activist, blogger, and author
• 1971 – Shelton Quarles, American football player and scout
• 1974 – DeLisha Milton-Jones, American basketball player and coach
• 1975 – Juan Cobián, Argentinian footballer
• 1975 – Pierre Issa, South African footballer
• 1976 – Tomáš Enge, Czech race car driver
• 1976 – Murali Kartik, Indian cricketer
• 1977 – Jonny Buckland, English guitarist
• 1977 – Ludacris, American rapper and producer
• 1977 – Matthew Stevens, Welsh snooker player
• 1977 – Tobias Zellner, German footballer
• 1978 – Ben Lee, Australian singer-songwriter, guitarist, and actor
• 1978 – Ed Reed, American football player
• 1978 – Dejan Stanković, Serbian footballer and manager
• 1979 – Éric Abidal, French footballer
• 1979 – Leon Cort, English footballer
• 1979 – Frank Francisco, Dominican baseball player
• 1979 – Steve Hofstetter, American comedian, journalist, and author
• 1979 – David Pizarro, Chilean footballer
• 1980 – Mike Comrie, Canadian ice hockey player
• 1980 – Dawit Kebede, Ethiopian journalist and publisher
• 1980 – Antônio Pizzonia, Brazilian race car driver
• 1981 – Andrea Dossena, Italian footballer
• 1981 – Charles Kelley, American singer-songwriter
• 1982 – Elvan Abeylegesse, Ethiopian-Turkish runner
• 1983 – Vivian Cheruiyot, Kenyan sprinter
• 1983 – Ike Diogu, American basketball player
• 1983 – Jacoby Ellsbury, American baseball player
• 1984 – Aled de Malmanche, New Zealand rugby player
• 1984 – Benson Stanley, New Zealand rugby player
• 1985 – Shaun Livingston, American basketball player
• 1985 – Zack Stortini, Canadian ice hockey player
• 1986 – Dwayne Jarrett, American football player
• 1986 – Chiliboy Ralepelle, South African rugby player
• 1987 – Robert Acquafresca, Italian footballer
• 1987 – Aroldis Chapman, Cuban baseball player
• 1988 – Mike Moustakas, American baseball player
• 1990 – Jo Inge Berget, Norwegian footballer
• 1990 – Jarrod Croker, Australian rugby league player
• 1991 – Jordan Ayew, Ghanaian footballer
• 1991 – Rhema Obed, English footballer
• 1992 – Jonathan Adams, English discus thrower
• 1993 – Farrah Moan, American drag queen and entertainer

• 883 – Kesta Styppiotes, Byzantine general
• 1063 – Béla I of Hungary (b. 1016)
• 1161 – Melisende, Queen of Jerusalem (b. 1105)
• 1185 – Stephen Hagiochristophorites, Byzantine courtier (b. 1130)
• 1279 – Robert Kilwardby, English cardinal (b. 1215)
• 1297 – Hugh de Cressingham, English Treasurer
• 1298 – Philip of Artois, Lord of Conches, Nonancourt, and Domfront (b. 1269)
• 1349 – Bonne of Bohemia (b. 1315)
• 1569 – Vincenza Armani, Italian actress (b. 1530)
• 1599 – Beatrice Cenci, Italian noblewoman (b. 1577)
• 1677 – James Harrington, English philosopher and author (b. 1611)
• 1680 – Emperor Go-Mizunoo of Japan (b. 1596)
• 1721 – Rudolf Jakob Camerarius, German botanist and physician (b. 1665)
• 1733 – François Couperin, French organist and composer (b. 1668)
• 1760 – Louis Godin, French astronomer and academic (b. 1704)
• 1823 – David Ricardo, English economist and politician (b. 1772)
• 1843 – Joseph Nicollet, French mathematician and explorer (b. 1786)
• 1865 – Christophe Léon Louis Juchault de Lamoricière, French general (b. 1806)
• 1888 – Domingo Faustino Sarmiento, Argentinian journalist and politician, 7th President of Argentina (b. 1811)
• 1896 – Francis James Child, American scholar and educator (b. 1825)
• 1911 – Louis Henri Boussenard, French explorer and author (b. 1847)
• 1915 – William Sprague IV, American businessman and politician, 27th Governor of Rhode Island (b. 1830)
• 1917 – Georges Guynemer, French captain and pilot (b. 1894)
• 1921 – Subramania Bharati, Indian journalist, poet, and activist (b. 1882)
• 1926 – Matsunosuke Onoe, Japanese actor and director (b. 1875)
• 1932
  • Stanisław Wigura, Polish pilot and businessman, co-founded the RWD Company (b. 1901)
  • Franciszek Żwirko, Polish soldier and pilot (b. 1895)
• 1935 – Charles Norris, American coroner (b. 1867)
• 1939 – Konstantin Korovin, Russian-French painter and set designer (b. 1861)
• 1941
  • Christian Rakovsky, Bulgarian physician, journalist, and politician, Soviet Ambassador to France (b. 1873)
• 1948 – Muhammad Ali Jinnah, Pakistani lawyer and politician, 1st Governor-General of Pakistan (b. 1876)
• 1949 – Henri Rabaud, French composer and conductor (b. 1873)
• 1950 – Jan Smuts, South African field marshal and politician, 2nd Prime Minister of South Africa (b. 1870)
• 1952 – Alfrēds Riekstiņš, Latvian military officer and freedom fighter (d. 1913)
• 1956 – Billy Bishop, Canadian colonel and pilot (b. 1894)
• 1957
  • James Burns, English cricketer (b. 1866)
  • Mary Proctor, American astronomer (b. 1862)
• 1958
  • Camillien Houde, Canadian politician, 34th Mayor of Montreal (b. 1889)
  • Robert W. Service, English-French poet and author (b. 1874)
• 1959 – Paul Douglas, American actor (b. 1907)
• 1964 – Gajanan Madhav Muktibodh, Indian poet and critic (b. 1917)
• 1965 – Ralph C. Smedley, American educator, founded Toastmasters International (b. 1878)
• 1966 – Collett E. Woolman, American businessman, co-founded Delta Air Lines (b. 1889)
• 1967 – Tadeusz Żyliński, Polish engineer and academic (b. 1904)
• 1968 – René Cogny, French general (b. 1904)
• 1971 – Nikita Khrushchev, Russian general and politician (b. 1894)
• 1972 – Max Fleischer, American animator, director, and producer (b. 1883)
• 1973
  • Salvador Allende, Chilean physician and politician, 29th President of Chile (b. 1908)
  • Neem Karoli Baba, Indian philosopher and guru
• 1974 – Lois Lenski, American author and illustrator (b. 1893)
• 1978
  • Mike Gazella, American baseball player and manager (b. 1895)
  • Georgi Markov, Bulgarian author and playwright (b. 1929)
  • Janet Parker, English photographer (b. 1938)
  • Ronnie Peterson, Swedish race car driver (b. 1944)
• 1984 – Jerry Voorhis, American politician (b. 1901)
• 1985
  • William Alwyn, English composer, conductor, and educator (b. 1905)
  • Eleanor Dark, Australian author (b. 1901)
• 1986
  • Panagiotis Kanellopoulos, Greek academic and politician, 138th Prime Minister of Greece (b. 1902)
  • Noel Streatfeild, English author (b. 1895)
• 1987
  • Lorne Greene, Canadian actor (b. 1915)
  • Peter Tosh, Jamaican singer-songwriter and guitarist (b. 1944)
  • Mahadevi Varma, Indian poet and educator (b. 1907)
• 1988 – Roger Hargreaves, English author and illustrator (b. 1935)
• 1990 – Myrna Mack, Guatemalan anthropologist and activist (b. 1949)
• 1991 – Ernst Herbeck, Austrian-German poet (b. 1920)
• 1993
  • Antoine Izméry, Haitian businessman and activist
  • Erich Leinsdorf, Austrian-American conductor (b. 1912)
• 1994
  • Jessica Tandy, English-American actress (b. 1909)
  • Luciano Sgrizzi, Italian harpsichordist, pianist, and composer (b. 1910)
• 1995 – Anita Harding, English neurologist and academic (b. 1952)
• 1997
  • Camille Henry, Canadian ice hockey player and coach (b. 1933)
  • Hannah Weiner, American poet (b. 1928)
• 1998 – Dane Clark, American actor (b. 1913)
• 1999
  • Belkis Ayón, Cuban painter and lithographer (b. 1967)
  • Gonzalo Rodríguez, Uruguayan race car driver (b. 1972)
• 2001
  • Alice Stewart Trillin, American author and educator (b. 1938)
  • Casualties of the September 11 attacks:
    • David Angell, American screenwriter and television producer (b. 1946)
    • Garnet Bailey, Canadian-American ice hockey player (b. 1948)
    • Berry Berenson, American photographer, actress, and model (b. 1948)
    • Carolyn Beug, American director and producer (b. 1952)
    • Bill Biggart, American photographer and journalist (b. 1947)
    • Ronald Paul Bucca, American fire marshal (b. 1954)
    • Charles Burlingame, American captain and pilot (b. 1949)
    • Kevin Cosgrove, American business executive (b. 1955)
    • Wilson Flagg, American admiral (b. 1938)
    • Mychal Judge, American priest and chaplain (b. 1933)
    • Daniel M. Lewin, American mathematician and businessman, co-founded Akamai Technologies (b. 1970)
    • Timothy Maude, American general (b. 1947)
    • Eamon McEneaney, American lacrosse player and poet (b. 1954)
    • John P. O'Neill, American FBI agent (b. 1952)
    • Barbara Olson, American lawyer and journalist (b. 1955)
    • Rick Rescorla, Cornish-American colonel (b. 1939)
• 2002
  • Kim Hunter, American actress (b. 1922)
  • Johnny Unitas, American football player and sportscaster (b. 1933)
  • David Wisniewski, American author and illustrator (b. 1953)
• 2003
  • Anna Lindh, Swedish politician, 39th Minister of Foreign Affairs for Sweden (b. 1957)
  • John Ritter, American actor (b. 1948)
• 2004
  • Fred Ebb, American songwriter (b. 1928)
  • David Mann, American painter and illustrator (b. 1939)
  • Patriarch Peter VII of Alexandria (b. 1949)
• 2006 – William Auld, Scottish poet and author (b. 1924)
• 2006 – Joachim Fest, German journalist and author (b. 1926)
• 2007 – Ian Porterfield, Scottish-English footballer and manager (b. 1946)
• 2007 – Gene Savoy, American explorer, theologian, and author (b. 1927)
• 2007 – Jean Séguy, French sociologist and author (b. 1925)
• 2007 – Joe Zawinul, Austrian keyboard player and songwriter (b. 1932)
• 2009 – Pierre Cossette, Canadian producer and manager (b. 1923)
• 2009 – Larry Gelbart, American director, producer, and screenwriter (b. 1928)
• 2009 – Yoshito Usui, Japanese author and illustrator (b. 1958)
• 2010 – Harold Gould, American actor (b. 1923)
• 2010 – Kevin McCarthy, American actor (b. 1914)
• 2011 – Christian Bakkerud, Danish race car driver (b. 1984)
• 2011 – Ralph Gubbins, English footballer (b. 1932)
• 2011 – Anjali Gupta, Indian soldier and pilot (b. 1975)
• 2011 – Andy Whitfield, Welsh actor and model
• 2012 – Finn Bergesen, Norwegian civil servant and businessman (b. 1945)
• 2012 – Tomas Evjen, Norwegian cinematographer and producer (b. 1972)
• 2012 – J. Christopher Stevens, American lawyer and diplomat, 10th United States Ambassador to Libya (b. 1960)
• 2013 – Marshall Berman, American philosopher, author, and critic (b. 1940)
• 2013 – Francisco Chavez, Filipino lawyer and politician, Solicitor General of the Philippines (b. 1947)
• 2013 – Keith Dunstan, American-Australian journalist and author (b. 1925)
• 2013 – Albert Jacquard, French geneticist and biologist (b. 1925)
• 2013 – Virgil A. Richard, American general (b. 1937)
• 2013 – Andrzej Trybulec, Polish mathematician and computer scientist (b. 1941)
• 2014 – Bob Crewe, American singer-songwriter and producer (b. 1930)
• 2014 – Antoine Duhamel, French composer and conductor (b. 1925)
• 2014 – Donald Sinden, English actor (b. 1923)
• 2015 – Dennis Paul Hebert, American businessman and politician (b. 1926)
• 2016 – Alexis Arquette, American actress, musician and cabaret performer (b. 1969)

• Battle of Tendra Day (Russia)
• Christian feast days:
  • Blessed Francesco Bonifacio
  • Deiniol
  • Felix, Regula, and Exuperantius
  • Harry Burleigh (Episcopal Church)
  • John Gabriel Perboyre (one of Martyr Saints of China)
  • Our Lady of Coromoto
  • Paphnutius of Thebes (Roman Catholic Church)
  • Protus and Hyacinth
  • September 11 (Eastern Orthodox liturgics)
• Death Anniversary of Quaid-e-Azam Muhammad Ali Jinnah (Pakistan)
• Emergency Number Day (United States)
• Enkutatash falls on this day if it is not a leap year. Celebrated on the first day of Mäskäräm. (Ethiopia, Rastafari)
• National Day (Catalonia)
• Nayrouz (Coptic Orthodox Church), September 12 on leap years.
• September 11 attacks-related observances (United States):
  • National Day of Service and Remembrance
  • Patriot Day
• Teachers' Day (Argentina)

• BBC: On This Day
• The New York Times: On This Day
• On This Day in Canada