| 27138 | March 11 | Event | 2009 – Winnenden school shooting: Sixteen are killed and 11 are injured before recent-graduate Tim Kretschmer shoots and kills himself, leading to tightened weapons restrictions in Germany. |
| 27139 | March 11 | Event | 2010 – Economist and businessman Sebastián Piñera is sworn in as President of Chile, while three earthquakes, the strongest measuring magnitude 6.9 and all centered next to Pichilemu, capital of Cardenal Caro province, hit central Chile during the ceremon |
| 27140 | March 11 | Event | 2011 – An earthquake measuring 9.0 in magnitude strikes 130 km (81 mi) east of Sendai, Japan, triggering a tsunami killing thousands of people. This event also triggered the second largest nuclear accident in history, and one of only two events to be clas |
| 27141 | March 11 | Event | 2012 – A U.S. soldier kills 16 civilians in the Panjwayi District of Afghanistan near Kandahar. |
| 27142 | March 11 | Event | 2014 – Russia annexed Autonomous Republic of Crimea. Getting 2014 Crimean crisis and 2014–15 Russian military intervention in Ukraine. |
| 27143 | March 11 | Birth | 1544 – Torquato Tasso, Italian poet and educator (d. 1595) |
| 27144 | March 11 | Birth | 1738 – Benjamin Tupper, American general (d. 1792) |
| 27145 | March 11 | Birth | 1745 – Bodawpaya, Burmese king (d. 1819) |
| 27146 | March 11 | Birth | 1785 – John McLean, American jurist and politician, 6th United States Postmaster General (d. 1861) |
| 27147 | March 11 | Birth | 1787 – Ivan Nabokov, Russian general (d. 1852) |
| 27148 | March 11 | Birth | 1811 – Urbain Le Verrier, French mathematician and astronomer (d. 1877) |
| 27149 | March 11 | Birth | 1818 – Marius Petipa, French-Russian dancer and choreographer (d. 1910) |
| 27150 | March 11 | Birth | 1819 – Henry Tate, English businessman and philanthropist, founded Tate & Lyle (d. 1899) |
| 27121 | March 11 | Event | 1933 – Ground breaking musical film 42nd Street is released. |
| 27122 | March 11 | Event | 1941 – World War II: United States President Franklin D. Roosevelt signs the Lend-Lease Act into law, allowing American-built war supplies to be shipped to the Allies on loan. |
| 27123 | March 11 | Event | 1942 – World War II: General Douglas MacArthur flees Corregidor. |
| 27124 | March 11 | Event | 1945 – World War II: The Imperial Japanese Navy attempts a large-scale kamikaze attack on the U.S. Pacific Fleet anchored at Ulithi atoll in Operation Tan No. 2. |
| 27125 | March 11 | Event | 1945 – World War II: The Empire of Vietnam, a short-lived Japanese puppet state, is established with Bảo Đại as its ruler. |
| 27126 | March 11 | Event | 1946 – Rudolf Höss, the first commandant of Auschwitz concentration camp, is captured by British troops. |
| 27127 | March 11 | Event | 1975 – Vietnam War: North Vietnamese and Viet Cong guerrilla forces establish control over Ban Me Thuot commune from the South Vietnamese army. |
| 27128 | March 11 | Event | 1977 – The 1977 Hanafi Siege: More than 130 hostages held in Washington, D.C., by Hanafi Muslims are set free after ambassadors from three Islamic nations join negotiations. |
| 27129 | March 11 | Event | 1978 – Coastal Road massacre: At least 37 are killed and more than 70 are wounded when Fatah hijack an Israeli bus, prompting Israel's Operation Litani. |
| 27130 | March 11 | Event | 1983 – Pakistan successfully conducts a cold test of a nuclear weapon. |
| 27131 | March 11 | Event | 1990 – Lithuania declares itself independent from the Soviet Union. |
| 27132 | March 11 | Event | 1990 – Patricio Aylwin is sworn in as the first democratically elected President of Chile since 1970. |
| 27133 | March 11 | Event | 1993 – Janet Reno is confirmed by the United States Senate and sworn in the next day, becoming the first female Attorney General of the United States. |
| 27134 | March 11 | Event | 1999 – Infosys becomes the first Indian company listed on the NASDAQ stock exchange. |
| 27135 | March 11 | Event | 2004 – Madrid train bombings: Simultaneous explosions on rush hour trains in Madrid, Spain, kill 191 people. |
| 27136 | March 11 | Event | 2006 – Michelle Bachelet is inaugurated as first female president of Chile. |
| 27137 | March 11 | Event | 2007 – Georgia claims Russian helicopters attacked the Kodori Valley in Abkhazia, an accusation that Russia categorically denies later. |