September 2 - James Allan, New Zealand rugby union player
October 22 - Pretty Boy Floyd, American gangster (b. 1904)
November 23 - Giovanni Brunero, Italian cyclist (b. 1895)
November 27 - Baby Face Nelson, American gangster (b. 1908)
November 30 - Hélène Boucher, French aviatrix (b. 1908)
December 12 - Thorleif Haug, Norwegian Nordic skier (b. 1894)
December 13 - Thomas A. Watson, American assistant to Alexander Graham Bell (b. 1854)
Events
January 1 - Alcatraz Island becomes a United States federal prison.
January 1 - Nazi Germany passes the "Law for the Prevention of Genetically Diseased Offspring".
January 13 - The Candidate of Science degree is established in the USSR.
January 26 - The Apollo Theater reopens in Harlem, New York City.
January 26 - German-Polish Non-Aggression Pact is signed.
January 28 - The first ski tow in the United States begins operation in Vermont.
February 6 - Far right leagues rally in front of the Palais Bourbon in an attempted coup against the French Third Republic, creating a political crisis in France.
February 12 - The Export-Import Bank of the United States is incorporated.
February 12 - In Spain the national council of Juntas de Ofensiva Nacional-Sindicalista is inaugurated. The council decides to merge the movement with the Falange Española.
February 13 - The Soviet steamship Cheliuskin sinks in the Arctic Ocean.
February 16 - Austrian Civil War ends with the defeat of the Social Democrats and the Republican Schutzbund.
February 16 - Commission of Government is sworn in as form of direct rule for the Dominion of Newfoundland.
February 23 - Léopold III becomes King of Belgium.
March 8 - A photograph by astronomer Edwin Hubble shows there are as many galaxies in the universe as there are stars in the Milky Way.
March 24 - U.S. Congress passes the Tydings-McDuffie Act.
March 26 - Driving test introduced in the United Kingdom.
April 12 - The strongest surface wind gust in the world at 231 mph, is measured on the summit of Mount Washington, US.
April 12 - The US Auto-Lite Strike begins, culminating in a five-day melee between Ohio National Guard troops and 6,000 strikers and picketers.
April 19 - Shirley Temple debuts in Stand Up and Cheer.
May 11 - Dust Bowl: A strong two-day dust storm removes massive amounts of Great Plains topsoil in one of the worst dust storms of the Dust Bowl in North America.
May 15 - Kārlis Ulmanis establishes an authoritarian government in Latvia.
May 21 - Oskaloosa, Iowa, becomes the first municipality in the United States to fingerprint all of its citizens.
May 23 - American bank robbers Bonnie and Clyde are ambushed by police and killed in Black Lake, Louisiana.
May 23 - The Auto-Lite Strike culminates in the "Battle of Toledo", a five-day melée between 1,300 troops of the Ohio National Guard and 6,000 picketers.
May 28 - Near Callander, Ontario, the Dionne quintuplets are born to Olivia and Elzire Dionne, later becoming the first quintuplets to survive infancy.
May 28 - The Glyndebourne festival in England is inaugurated.
June 6 - New Deal: U.S. President Franklin D. Roosevelt signs the Securities Act of 1933 into law, establishing the U.S. Securities and Exchange Commission and Judge Joseph Crater is declared dead in absentia.
June 9 - Donald Duck makes his debut in The Wise Little Hen.
June 13 - Adolf Hitler and Mussolini meet in Venice, Italy; Mussolini later describes the German dictator as "a silly little monkey".
June 14 - James J. Braddock scores one of the most upsetting victories in of his boxing career by beating John "Corn" Griffin
June 15 - The U.S.'s Great Smoky Mountains National Park is founded.
June 19 - The Communications Act of 1934 establishes the United States' Federal Communications Commission (FCC).
June 26 - President Franklin D. Roosevelt signs the Federal Credit Union Act, which establishes credit unions.
June 30 - The Night of the Long Knives, Adolf Hitler's violent purge of his political rivals in Germany, takes place.
July 2 - The Night of the Long Knives ends with the death of Ernst Röhm.
July 4 - Leo Szilard patents the chain-reaction design for the atomic bomb.
July 15 - Continental Airlines commences operations.
July 20 - Labor unrest in the U.S., as police in Minneapolis fire upon striking truck drivers, wounding fifty; Seattle police led by the mayor police fire tear gas on and club 2,000 striking longshoremen, and the governor of Oregon calls out the National Guard to break a strike on the Portland docks.
July 22 - Outside Chicago's Biograph Theatre, "Public Enemy No. 1" John Dillinger is mortally wounded by FBI agents.
July 25 - The Nazis assassinate Austrian Chancellor Engelbert Dollfuss in a failed coup attempt.
July 26 - Assassination of Austrian Chancellor Engelbert Dollfuss.
August 2 - Gleichschaltung: Adolf Hitler becomes Führer of Germany.
August 3 - Adolf Hitler becomes the supreme leader of Germany by joining the offices of President and Chancellor into Führer.
August 11 - First civilian prisoners arrive at Federal prison on Alcatraz Island.
August 19 - The first All-American Soap Box Derby is held in Dayton, Ohio.
August 19 - The creation of the position Führer is approved by the German electorate with 89.9% of the popular vote.
September 1 - SMJK Sam Tet was founded by Father Fourgs from the St. Michael Church, Ipoh, Perak, Malaysia.
September 8 - Off the New Jersey coast, a fire aboard the passenger liner SS Morro Castle kills 135 people.
September 18 - The USSR is admitted to League of Nations.
September 19 - Bruno Hauptmann is arrested for the kidnap and murder of Charles Lindbergh Jr..
September 21 - A large typhoon hits western Honshū, Japan, killing 3,036 people.
September 22 - An explosion takes place at Gresford Colliery in Wales, leading to the deaths of 266 miners and rescuers.
September 26 - Steamship RMS Queen Mary is launched.
October 9 - Regicide at Marseille: The assassination of King Alexander I of Yugoslavia and Louis Barthou, Foreign Minister of France.
October 15 - The Soviet Republic of China collapses when Chiang Kai-shek's National Revolutionary Army successfully encircle Ruijin, forcing the fleeing Communists to begin the Long March.
October 16 - Chinese Communists begin the Long March; it ended a year and four days later, by which time Mao Zedong had regained his title as party chairman.
October 22 - In East Liverpool, Ohio, notorious bank robber Pretty Boy Floyd is shot and killed by Federal Bureau of Investigation agents.
November 6 - Memphis, Tennessee becomes the first major city to join the Tennessee Valley Authority.
November 23 - An Anglo-Ethiopian boundary commission in the Ogaden discovers an Italian garrison at Walwal, which lay well within Ethiopian territory. This leads to the Abyssinia Crisis.
November 27 - Bank robber Baby Face Nelson dies in a shoot-out with the FBI.
November 29 - The Chicago Bears defeat the Detroit Lions 19-16 in the first nationally broadcast game.
November 30 - The steam locomotive Flying Scotsman becomes the first to officially exceed 100mph.
December 1 - In the Soviet Union, Politburo member Sergei Kirov is shot dead at the Communist Party headquarters in Leningrad by Leonid Nikolayev.
December 5 - Abyssinia Crisis: Italian troops attack Wal Wal in Abyssinia, taking four days to capture the city.
December 29 - Japan renounces the Washington Naval Treaty of 1922 and the London Naval Treaty of 1930.