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This section of thetimeline of United States history concern events from1900 to 1929.

• 1900 – PresidentWilliam McKinley reelected;Theodore Roosevelt elected vice president.

• March 4, 1901 – President McKinley begins second term; Roosevelt becomes the 25th vice president.
• September 6, 1901 – McKinley is shot, inBuffalo, New York.
• September 14, 1901 – President McKinley dies, Vice President Roosevelt becomes the 26th president^[1]
• 1901 –U.S. Steel founded byJohn Pierpont Morgan
• 1901 –Hay–Pauncefote Treaty
• 1901 –Louis Armstrong born
• 1902 –Drago Doctrine
• 1902 – FirstRose Bowl game played
• 1902 –Newlands Reclamation Act
• 1903 –Great Train Robbery movie opens
• 1903 –Harley-Davidson Motor Company created
• 1903 –Ford Motor Company formed
• 1903 – FirstWorld Series
• 1903 –Elkins Act
• 1903 –Big stick ideology
• 1903 –Hay–Bunau-Varilla Treaty
• 1903 –Hay–Herrán Treaty
• 1903 –United States Department of Commerce and Labor created
• 1903 – TheWright brothers make their first powered flight in theWright Flyer atKitty Hawk, North Carolina
• 1904 –Roosevelt Corollary toMonroe Doctrine
• 1904 –Panama Canal Zone acquired
• 1904 –Louisiana Purchase Exposition, St. Louis
• 1904 –U.S. presidential election:Theodore Roosevelt elected president for full term;Charles W. Fairbanks elected vice president
• March 4, 1905 – President Roosevelt begins full term, Fairbanks becomes the 26th vice president
• 1905 –Niagara Falls conference
• 1905 –Industrial Workers of the World
• 1905 –Albert Einstein publishes histheory of relativity
• 1906 –Susan B. Anthony dies
• 1906 –Algeciras Conference
• 1906 –Pure Food and Drug Act andFederal Meat Inspection Act
• 1906 –Hepburn Act
• 1906 – Theodore Roosevelt negotiatesTreaty of Portsmouth, receivesNobel Peace Prize

• 1906 –San Francisco earthquake
• 1907 –Oklahoma becomes a state
• 1907 –Gentlemen's Agreement
• 1907 –Coal mine explodes in Monongah, West Virginia, killing at least 361. Worst industrial accident in American history.
• 1908 –Ford Model T appears on the market
• 1908 –Root–Takahira Agreement
• 1908 –Federal Bureau of Investigation established
• 1908 –Aldrich–Vreeland Act
• 1908 –U.S. presidential election:William Howard Taft elected president;James S. Sherman vice president.William Jennings Bryan loses for the third and final time.
• 1909 – TheU.S. penny is changed to theAbraham Lincoln design

• March 4, 1909 – Taft becomes the 27th president; Sherman becomes the 27th vice president
• 1909 –Robert Peary claims to have reached theNorth Pole
• 1909 –NAACP founded byW. E. B. Du Bois
• 1909 –Payne–Aldrich Tariff Act
• 1909 – Taft implementsdollar diplomacy
• 1909 –Pinchot–Ballinger controversy

• 1910 –Mann–Elkins Act
• 1910 –Mann Act
• 1911 –Supreme Court breaks upStandard Oil
• 1911 –Triangle Shirtwaist Factory fire
• 1911 – FirstIndianapolis 500 is staged;Ray Harroun is the first winner
• 1912 – RMSTitanic sank
• 1912 –New Mexico andArizona become states
• 1912 –Girl Scouts of the USA was started by Juliette Gordon Low
• 1912 –Theodore Roosevelt shot, but not killed, while campaigning for the presidency
• October 30, 1912 – Vice President Sherman dies
• 1912 –U.S. presidential election:Woodrow Wilson elected president,Thomas R. Marshall, vice president. Roosevelt becomes the onlythird party candidate to come in second for well over a century.

• March 4, 1913 – Wilson becomes the 28th president and Marshall becomes the 28th vice president
• 1913 –Woman Suffrage Procession, a largewoman suffrage parade in Washington, D.C., is organized byAlice Paul and held on the eve of Wilson's inaugural
• 1913 –16th Amendment, establishing an income tax
• 1913 – End of thePhilippine–American War
• 1913 – TheArmory Show opens in New York City introducingModern art both American and European to the American public.
• 1913 –17th Amendment, establishing the direct election of U.S. Senators.
• 1913 –Underwood Tariff
• 1913 – Federal Reserve Act was passed by the 63rd United States Congress and signed into law by President Woodrow Wilson on December 23, 1913.Federal Reserve Act
• 1913 –Henry Ford develops the modernassembly line
• 1914 –Mother's Day established as a national holiday
• 1914 –Federal Trade Commission created
• 1914 –Clayton Antitrust Act
• 1914 –ABC Powers
• 1914 – World War I begins whenAustria–Hungary declares war onSerbia
• 1915 –The Birth of a Nation opens
• 1915 –RMSLusitania sunk
• 1915 –First transcontinental telephone is hooked up
• 1916 – the U.S. acquiresVirgin Islands
• 1916 –Jeannette Rankin first woman elected to U.S. congress
• 1916 –Louis Brandeis appointed toSupreme Court
• 1916 –Adamson Act
• 1916 –Federal Farm Loan Act
• 1916 –Jones Act
• 1916 –1916 United States presidential election:Woodrow Wilson is reelected president andThomas R. Marshall is reelected vice president, by a mere 3,773 votes in California
• 1916 –Germany agrees to restrictsubmarine warfare
• 1916 –The Great Migration begins
• 1917 –Zimmermann Telegram
• March 4, 1917 – President Wilson and Vice President Marshall begin their second terms
• 1917 – U.S. enters World War I
• 1917 –Espionage and Sedition Acts
• 1917 –Lansing–Ishii Agreement
• 1917 –National Hockey League formed
• 1917 –U.S. Virgin Islands purchased from Denmark
• 1917 –Temperance movement leads toprohibition laws in 29 states
• 1917–1919 –Silent Sentinels hold a vigil outside the White House gates in favor of women's suffrage, a nearly two–and–a–half year demonstration organized byAlice Paul and theNational Woman's Party
• 1917–1920 –First Red Scare, marked by a widespread fear of Bolshevism and anarchism
• 1918 – President Wilson'sFourteen Points, which assures citizens that the Great War was being fought for a moral cause and postwar peace in Europe
• 1918 – Republicans win back Congress in the Midterm elections.
• 1918 – Armistice agreement ends World War I
• 1918 –Spanish flu pandemic begins
• 1918 –Daylight saving time is first adopted
• 1919 –Treaty of Versailles agreed to byvictorious powers.
• 1919 – President Wilson has a massive stroke. First LadyEdith Wilson takes over in a "silent coup".
• 1919 –United States Senate rejectsTreaty of Versailles andLeague of Nations
• 1919 –18th Amendment, establishingProhibition
• 1919 –Black Sox Scandal duringthat year's World Series, with the fallout lasting for decades
• 1919 –Sherwood Anderson publishesWinesburg, Ohio
• 1919 –Palmer Raids

• 1920 –19th Amendment, grants women the right to vote
• 1920 –The Great Steel Strike ends
• 1920 –Sacco and Vanzetti arrested
• 1920 – First radio broadcasts, byKDKA in Pittsburgh andWWJ in Detroit
• 1920 –Volstead Act
• 1920 –Esch–Cummins Act
• 1920 – Economy collapses. The Depression of 1920–21 begins.
• 1920 –National Football League is formed
• 1920 –1920 U.S. presidential election:Warren G. Harding elected president, andCalvin Coolidge vice president.

• March 4, 1921 – Harding becomes the 29th president and Coolidge becomes the 29th vice president
• 1921 –Washington Disarmament Conference of 1921
• 1921 –Emergency Quota Act
• 1921 –Tulsa race massacre
• 1921 – After refusing to sign theTreaty of Versailles and join theLeague of Nations, the U.S. Senate signed separate treaties withGermany,Austria, andHungary.
• 1922 –Fordney–McCumber Tariff
• 1922 –Lincoln Memorial is dedicated
• 1922 – TheNine Power Treaty
• The Early 1920s –Hollywood becomes the center of the movie industry.
• 1923 –Teapot Dome scandal
• August 2, 1923 – President Harding dies; Vice President Coolidge becomes the 30th president

• 1923 –The Cotton Club opens in Harlem
• 1923 –Yankee Stadium was built
• 1924 –Immigration Act Basic Law
• 1924 –Indian Citizenship Act
• 1924 –J. Edgar Hoover is appointed director of theBureau of Investigation – the predecessor to theFBI.,
• 1924 –1924 U.S. presidential election:Calvin Coolidge elected president for a full term,Charles G. Dawes elected vice president
• 1924 –The Dawes Plan
• March 4, 1925 – President Coolidge begins full term, Dawes becomes the 30th vice president
• 1925 –Scopes Trial, whose outcome found that the teaching of evolution in the classroom "does not violate church and state or state religion laws but instead, merely prohibits the teaching of evolution on the grounds of intellectual disagreement"
• 1925 –Nellie Tayloe Ross elected governor ofWyoming
• 1925 –WSM broadcasts theGrand Ole Opry for the first time.
• 1925 –Countee Cullen published a book of poems calledColor.
• 1925 –F. Scott Fitzgerald publishesThe Great Gatsby
• 1926 –NBC founded as the U.S.'s first major broadcast network
• 1926 –United States intervenes in Nicaragua
• 1926 –Opportunity Magazine publishesLangston Hughes'The Weary Blues
• 1926 –The Sun Also Rises byErnest Hemingway is published.
• 1927 –Sacco and Vanzetti executed, seven years after they were convicted of murdering two men during an armed robbery in Massachusetts
• 1927 –Charles Lindbergh makes first trans–Atlantic flight
• 1927 –The Jazz Singer, the firstmotion picture with sound, is released
• 1927 – U.S. citizenship granted to inhabitants ofU.S. Virgin Islands
• 1927 –Columbia Broadcasting System (later called CBS) was founded, and becomes the second national radio network in the U.S.
• 1927 – The 15,000,000thModel T rolled off theAssembly Line atFord Motor Company.
• 1927 –Babe Ruth hits a record 60 home runs in a single season
• 1928 – Disney'sSteamboat Willie opens, the first animated picture to featureMickey Mouse
• 1928 –Kellogg–Briand Pact
• 1928 –Amelia Earhart becomes the first woman to fly across the Atlantic Ocean.
• 1928 – First color motion pictures are demonstrated byGeorge Eastman
• 1928 –1928 U.S. presidential election:Herbert C. Hoover elected president andCharles Curtis vice president

• 1929 –St. Valentine's Day Massacre
• March 4, 1929 – Hoover becomes the 31st president and Curtis becomes the 31st vice president.
• 1929 –Wall Street crash of 1929 occurs, resulting in the Great Depression.

• Roaring Twenties
• History of the United States (1865–1917)
• History of the United States (1917–1945)

• H-SHGAPE discussion forum for people studying the Gilded Age and Progressive Era

• Timelines of United States history by period
• 1900s in the United States
• 1910s in the United States
• 1920s in the United States

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