List of 1811 Major News Events in History, Most Important Historical Events in 1811
| Date | Event | 
|---|---|
| January 8, 1811 | Charles Deslondes leads an unsuccessful slave revolt in the North American settlements of St. Charles and St. James, Louisiana. | 
| January 17, 1811 | Mexican War of Independence: In the Battle of Calderón Bridge, a heavily outnumbered Spanish force of 6,000 troops defeats nearly 100,000 Mexican revolutionaries. | 
| March 1, 1811 | Leaders of the Mamluk dynasty are killed by Egyptian ruler Muhammad Ali. | 
| March 2, 1811 | Argentine War of Independence: A royalist fleet defeats a small flotilla of revolutionary ships in the Battle of San Nicolás on the River Plate. | 
| March 5, 1811 | Peninsular War: A French force under the command of Marshal Victor is routed while trying to prevent an Anglo-Spanish-Portuguese army from lifting the Siege of Cádiz in the Battle of Barrosa. | 
| March 9, 1811 | Paraguayan forces defeat Manuel Belgrano at the Battle of Tacuarí. | 
| March 12, 1811 | Peninsular War: A day after a successful rearguard action, French Marshal Michel Ney once again successfully delays the pursuing Anglo-Portuguese force at the Battle of Redinha. | 
| March 13, 1811 | A French and Italian fleet is defeated by a British squadron off the island of Vis in the Adriatic during the Napoleonic Wars. | 
| March 25, 1811 | Percy Bysshe Shelley is expelled from the University of Oxford for publishing the pamphlet The Necessity of Atheism. | 
| May 14, 1811 | Paraguay: Pedro Juan Caballero, Fulgencio Yegros and José Gaspar Rodríguez de Francia start actions to depose the Spanish governor. | 
| May 16, 1811 | Peninsular War: The allies Spain, Portugal and United Kingdom fight an inconclusive battle against the French at the Albuera.[6] It is, in proportion to the numbers involved, the bloodiest battle of the war. | 
| May 18, 1811 | Battle of Las Piedras: The first great military triumph of the revolution of the Río de la Plata in Uruguay led by José Artigas. | 
| June 16, 1811 | Survivors of an attack the previous day by Tla-o-qui-aht on board the Pacific Fur Company's ship Tonquin, intentionally detonate a powder magazine on the ship, destroying it and killing about 100 attackers. | 
| July 5, 1811 | The Venezuelan Declaration of Independence is adopted by a congress of the provinces. | 
| July 9, 1811 | Explorer David Thompson posts a sign near what is now Sacajawea State Park in Washington state, claiming the Columbia District for the United Kingdom. | 
| July 30, 1811 | Father Miguel Hidalgo y Costilla, leader of the Mexican insurgency, is executed by the Spanish in Chihuahua City, Mexico. | 
| August 3, 1811 | First ascent of Jungfrau, third highest summit in the Bernese Alps by brothers Johann Rudolf and Hieronymus Meyer. | 
| October 11, 1811 | The Juliana begins operation as the first steam-powered ferry in New York harbor. | 
| October 17, 1811 | The silver deposits of Agua Amarga are discovered in Chile becoming in the following years instrumental for the Patriots to finance the Chilean War of Independence. | 
| November 5, 1811 | Salvadoran priest José Matías Delgado rings the bells of La Merced church in San Salvador, calling for insurrection and launching the 1811 Independence Movement. | 
| November 7, 1811 | Tecumseh's War: The Battle of Tippecanoe is fought near present-day Battle Ground, Indiana, United States. | 
| November 17, 1811 | José Miguel Carrera, Chilean founding father, is sworn in as President of the executive Junta of the government of Chile. | 
| November 28, 1811 | Beethoven's Piano Concerto No. 5 in E-flat major, Op. 73, premieres at the Gewandhaus in Leipzig. | 
| December 16, 1811 | The first two in a series of four severe earthquakes occur in the vicinity of New Madrid, Missouri. | 
| December 26, 1811 | A theater fire in Richmond, Virginia kills the Governor of Virginia George William Smith and the president of the First National Bank of Virginia Abraham B. Venable. |