1908 1909 1910 - 1911 - 1912 1913 1914
1880s 1890s 1900s - 1910s - 1920s 1930s 1940s
Events of 1911
- January 1 - Northern Territory is politically separated from South Australia and transferred to Commonwealth control.
- January 3 - In London, in what becomes known as the Siege of Sidney Street, the Metropolitan Police and the Scots Guards engage in a shootout with a criminal gang of Latvian anarchists held up in a building in the East End.
- January 5 - Kappa Alpha Psi Fraternity is founded at Indiana University, Bloomington, Indiana.
- January 10 - Major Jimmie Erickson takes the first aerial photograph (over San Diego, California).
- January 12 - The University of the Philippines College of Law is formally established; three future Philippine presidents are among the first enrollees.
- January 18 - Eugene B. Ely lands on the deck of the USS Pennsylvania stationed in San Francisco harbor, marking the first time an aircraft landed on a ship.
- January 21 - First Monte Carlo races (Rallye Automobile Monte Carlo).
- January 21 - The Tati Concessions Land, formerly part of Matabeleland, was formally annexed to the Bechuanaland Protectorate (modern Botswana).
- January 26 - Glenn H. Curtiss flies the first successful seaplane.
- January 30 - The destroyer USS Terry makes the first airplane rescue at sea, saving the life of James McCurdy 10 miles from Havana, Cuba.
- February 18 - First official air mail flight took place in Allahabad, India to Naini, India, when Henri Pequet carried 6,500 letters a distance of 13 km.
- March 1 - José Batlle y Ordóñez is elected President of Uruguay.
- March 8 - International Women's Day is celebrated for the first time
- March 10 - Kansas legislature approves House Bill Number 906, effectively the first blue sky law in the United States, culminating an effort by Joseph Norman Dolley, Kansas' banking commissioner.
- March 24 - Denmark abolishes death penalty and flogging
- March 25 - Fire at the Triangle Shirtwaist Factory in New York City - 145 dead
- March 29 - United States Army formally adopts the M1911 pistol as its standard sidearm, thus giving the gun its 1911 designation.
- April 6 - Dedë Gjon Luli Dedvukaj, Leader of the Malësori Albanians raises the Albanian flag in the town of Tuzi, Montenegro for the first time after Gjergj Kastrioti (Skenderbeg).
- April 13 - Mexican revolution - Rebels take Agua Prieta along the US border. Government troops take the town back April 17 when the rebel leader "Red" Lopez is drunk
- April 19 - Mexican Revolution - Francisco Madero's troops besiege Ciudad Juarez but general Juan J. Navarro refuses his demand of surrender
- April 27 - Following the resignation and death of William P. Frye, a compromise is reached to rotate the office of President pro tempore of the United States Senate.
- April 30 - Sparks from a burning hayshed ignite the Great Fire of 1911, destroying much of downtown Bangor, Maine.
- May 8 - Mexican Revolution - Pancho Villa launches an attack against government troops in Ciudad Juarez without Madero's permission. Government troops surrender May 10.
- May 11 - Futurist exhibition in Milan was the first of efforts by the group to make its theories concrete.
- May 15 - The United States Supreme Court declares Standard Oil to be an "unreasonable" monopoly under the Sherman Antitrust Act and orders the company to be dissolved.
- May 17 - Mexican Revolution - Porfirio Diaz is convinced to resign but he does not do it officially.
- May 21 - Mexican Revolution - Peace treaty between rebels of Madero and government troops in Ciudad Juarez.
- May 23 - Dedication ceremony for the New York Public Library.
- May 24 - Mexican Revolution - Government troops fire at anti-Diaz demonstrators in Mexico City - about 200 dead (official claim only 40).
- May 25 - Mexican Revolution - Diaz signs his resignation and leaves for Veracruz; on May 31 he leaves for exile in France.
- May 30 - The first Indianapolis 500-mile auto race is run. The winner is Ray Harroun in the Marmon 'Wasp' and titanic was lunched.
- June 7 - Mexican Revolution - Francisco Madero arrives in Mexico City just after a local earthquake.
- June 14 - A national seamen's strike begins in Britain.
- June 15 - IBM incorporated as Computing Tabulating Recording Corporation (CTR) in New York.
- June 16 - A 772-gram stony meteorite struck earth in Columbia County, Wisconsin near the village of Kilbourn damaging a barn.
- June 22 - Coronation of George V of the United Kingdom and Mary of Teck at Westminster Abbey, London.
- June 28 - The Nakhla meteorite (from Mars) lands in the area of Alexandria, Egypt, purportedly killing a dog.
- July 1 - German Warship Panther in the Moroccan port of Agadir triggers Agadir Crisis escalating pre-WW1 tensions. Subsequent climbdown rallies German militancy.
- July 24 - Hiram Bingham rediscovers Machu Picchu.
- August 8 - Public Law 62-5 sets the number of representatives in the United States House of Representatives at 435. The law will take effect in 1913.
- August 9 - Raunds, Northamptonshire records a temperature of 98°F (36.7°C), the highest UK temperature until 1990.
- August 10 - British MPs vote to receive salaries for the first time.
- August 22 - Theft of Mona Lisa discovered in [Louvre] (Vincenzo Peruggia is captured and the painting returned 1913).
- September 7 - French poet Guillaume Apollinaire is arrested and put in jail on suspicion of stealing the Mona Lisa from the Louvre museum. He is later released.
- September 11 - Middle Tennessee State University is founded in Murfreesboro, Tennessee as Middle Tennessee Normal School.
- September 20 - The liner RMS Olympic, sister ship to the RMS Titanic, collides with Royal Navy cruiser HMS Hawke outside Southampton, England.
- September 25
- October 6 - The British Seafarers' Union was formed in Southampton in England.
- October 10
- October 16 - Mexican Revolution - Felix Diaz, nephew of Porfirio Diaz, occupies the port of Veracruz as a sign of rebellion against Madero
- October 18 - revolutionaries under Sun Yat-sen overthrew China's Manchu dynasty.
- October 24 - Orville Wright remained in the air 9 minutes and 45 seconds in a glider at Kill Devil Hills, North Carolina setting a new world record that stood for 10 years. 
- October 28 - Foundation of The Rosicrucian Fellowship's international headquarters at Mount Ecclesia, Oceanside, California. It had been preceded by its formal constitution in August 8 1909 at Seattle, Washington.
- November 3 - Chevrolet officially enters the automobile market to compete with the Ford Model T.
- November 4 - Selandia launched in Denmark, the first ocean going diesel Ship.
- November 5 - After declaring war on Turkey on September 29, 1911, Italy annexes Tripoli and Cyrenaica (this act was confirmed by an act of the Italian Parliament on February 25, 1912).
- November 11
- A record cold snap hits the United States midwest. Many cities break record highs and lows on same day. (see The 11/11/11 cold wave).
- Big fire struck Visoko burning over 450 houses and other objects. The upper city area was completely burned, as well all the houses down the main street alongside Beledija.
- November 15 - Prince Louis Honoré Charles Antoine Grimaldi of Monaco, heir to the throne and later Reigning Prince Louis II of Monaco officially recognizes his illegitimate daughter Charlotte Louise Juliette Louvet as Princess Charlotte of Monaco.
- November 16 - Earthquake in Swab, South Germany
- November 17 - Omega Psi Phi Fraternity is founded at Howard University.
- December 11 - Coronation in New Delhi of George V of the United Kingdom and Mary of Teck as Emperor of India and Empress consort respectively
- December 12 - The capital of India was shifted to New Delhi from Calcutta (now Kolkata).
- December 14 - Roald Amundsen's expedition reaches the South Pole
- December 21 - First robbery of the Bonnot gang
- December 23 - Stanislavski and Craig's seminal production of Hamlet opened at the Moscow Arts Theatre
- December 24 - Opening of Lackawanna Cutoff, the first of two major cutoffs built by the Delaware, Lackawanna and Western Railroad, just three years after it was built.
- December 29 - Sun Yat-sen becomes the first President of the Republic of China
- February 6 - Ronald Reagan, 40th President of the United States (d. 2004)
- March 13 - L. Ron Hubbard, American science fiction author and founder of Scientology (d. 1986)
- March 16 - Josef Mengele, German SS physician (d. 1979)
- March 24 - Tyler Kent, American whistleblower during WWII (d. 1988)
- April 25 - Jack Ruby, convicted murderer of Lee Harvey Oswald (d. 1967)
- September 7 - Todor Zhivkov, Bulgarian communist politician (d. 1998)