Timeline of United States history (1900–1929)

This section of the Timeline of United States history concerns events from 1900 to 1929.

1900s

*1900 - U.S. population exceeds 75 million
*1900 - Foraker Act
*1900 - Gold Standard Act
*1900 - U.S. helps put down Boxer Rebellion
*1901 - William McKinley assassinated
*1901 - Theodore Roosevelt becomes President
*1901 - U.S. Steel founded by John Pierpont Morgan
*1901 - Hay-Pauncefote Treaty
*1902 - Drago Doctrine
*1902 - First Rose Bowl game played
*1902 - Newlands Reclamation Act
*1903 - "Great Train Robbery" movie opens
*1903 - Ford Motor Company formed
*1903 - First World Series
*1903 - Elkins Act
*1903 - Big Stick Diplomacy
*1903 - Hay-Bunau Varilla Treaty
*1903 - Hay-Herran Treaty
*1903 - Department of Commerce and Labor created
*1903 - The first powered flight is made at Kitty Hawk, North Carolina
*1904 - Roosevelt Corollary to Monroe Doctrine
*1904 - Panama Canal Zone acquired
*1905 - Niagara Falls conference
*1905 - Industrial Workers of the World (IWW) formed
*1906 - Susan B. Anthony dies
*1906 - Algeciras Conference
*1906 - Pure Food and Drug Act and Meat Inspection Act
*1906 - Hepburn Act
*1906 - Theodore Roosevelt negotiates Treaty of Portsmouth, receives Nobel Peace Prize
*1906 - Massive earthquake in San Francisco; fires burn and as many as 3,000 are dead.
*1907 - Oklahoma becomes a state
*1907 - Gentlemen's Agreement
*1908 - Ford Model T appears on market
*1908 - Root-Takahira agreement
*1908 - Federal Bureau of Investigation established
*1908 - Aldrich Vreeland Act
*1909 - The U.S. penny is changed to the Abraham Lincoln design
*1909 - William Howard Taft becomes President
*1909 - Robert Peary plants American flag at North Pole
*1909 - NAACP founded by W. E. B. DuBois
*1909 - Payne-Aldrich tariff
*1909 - Taft implements Dollar Diplomacy
*1909 - Ballinger-Pinchot Controversy

1910s

*1910 - Boy Scouts of America chartered
*1910 - Mann-Elkins Act
*1910 - Mann Act
*1911 - Supreme Court breaks up Standard Oil
*1911 - First ever Indianapolis 500 is staged
*1912 - RMS "Titanic" sinks
*1912 - New Mexico and Arizona become states
*1912 - Theodore Roosevelt shot, but not killed, while campaigning for the Bull Moose Party
*1913 - Harriet Tubman dies
*1913 - Woodrow Wilson becomes President
*1913 - Federal Reserve Act
*1913 - 16th Amendment
*1913 - 17th Amendment
*1913 - Underwood tariff
*1914 - Mother's Day created
*1914 - Federal Trade Commission created
*1914 - Clayton Antitrust Act
*1914 - ABC Powers
*1915 - "The Birth of a Nation" opens
*1915 - RMS "Lusitania" sunk
*1916 - U.S. acquires Virgin Islands
*1916 - Jeannette Rankin elected
*1916 - Louis Brandeis appointed to Supreme Court
*1916 - Adamson Railway Labor Act
*1916 - Federal Farm Loan Act
*1917 - Zimmermann telegram
*1917 - U.S. enters World War I
*1917 - Espionage and Sedition Acts
*1917 - Lansing-Ishii Agreement
*1917 - U.S. Virgin Islands purchased from Denmark
*1918 - President Wilson's Fourteen Points
*1919 - Treaty of Versailles ends World War I
*1919 - United States Senate rejects Treaty of Versailles and League of Nations
*1919 - 18th Amendment
*1919-1920 Red Scare (Note: The time that this event occurred can be debated. These are the two major years.)

1920s

*1920 - 19th Amendment
*1920 - Sacco and Vanzetti arrested
*1920 - First radio broadcast in Pittsburgh, Pennsylvania
*1920 - Volstead Act
*1920 - Esch-Cummins Act
*1921 - Warren G. Harding becomes President
*1921 - Washington Disarmament Conference of 1921
*1921 - Emergency Quota Act
*1922 - Fordney-McCumber tariff
*1923 - Warren G. Harding dies
*1923 - Calvin Coolidge becomes President
*1923 - Yankee Stadium opens
*1923 - Teapot Dome Scandal
*1924 - Immigration Act Basic Law
*1925 - Scopes trial
*1925 - Nellie Tayloe Ross elected
*1927 - Sacco and Vanzetti executed
*1927 - Charles Lindbergh makes first trans-Atlantic flight
*1927 - "The Jazz Singer", the first "talkie" (motion picture with sound) is released
*1927 - U.S. citizenship granted to inhabitants of U.S. Virgin Islands
*1928 - Disney's "Steamboat Willie" opens
*1928 - Kellogg-Briand Pact
*1929 - Herbert Hoover becomes President
*1929 - St. Valentine's Day massacre
*1929 - Immigration Act
*1929 - Great Depression begins
*1929 - American Samoa officially becomes a U.S. territory

timeline
before=1860-1899
title=Timeline of United States history
years=1900–1929
after=1930-1949