|1921 in the United States|
|Years:||1918 1919 1920 – 1921 – 1922 1923 1924|
48 stars (1912–1959)
Events from the year 1921 in the United States.
- President: Woodrow Wilson (Democratic) (until March 4), Warren G. Harding (Republican) (starting March 4)
- Vice President: Thomas R. Marshall (Democratic) (until March 4), Calvin Coolidge (Republican) (starting March 4)
- Chief Justice: Edward Douglass White (until May 19), William Howard Taft (starting July 11)
- Speaker of the House of Representatives: Frederick H. Gillett (R-Massachusetts)
- Congress: 66th (until March 4), 67th (starting March 4)
- January 1 – In American football, the University of California defeats Ohio State 28–0 in the Rose Bowl.
- January 2 – The first religious radio broadcast is heard over station (KDKA AM in Pittsburgh, Pennsylvania).
- March 4 – Warren G. Harding is inaugurated as the 29th President of the United States.
- April 20 – Ferenc Molnár's play Liliom is first produced on Broadway in English.
- May 19 – The Emergency Quota Act passes the U.S. Congress, establishing national quotas on immigration.
- May 31 – Tulsa Race Riot: The official death toll is 39, but recent investigations suggest the actual toll may be much higher.
- July 2 – U.S. President Warren Harding signs a joint congressional resolution declaring an end to America's state of war with Germany, Austria and Hungary.
- July 14 – A Massachusetts jury finds Nicola Sacco and Bartolomeo Vanzetti guilty of first degree murder following a widely publicized trial.
- July 26 – U.S. President Warren G. Harding receives Princess Fatima of Afghanistan and Stanley Clifford Weyman.
- August – The United States formally ends World War I, declaring a peace with Germany.
- August 5 – The first radio baseball game is broadcast; Harold Arlin announces the Pirates-Phillies game from Forbes Field over Westinghouse KDKA, in Pittsburgh.
- August 25–September 2 – An uprising of striking coal miners in West Virginia leads to the Battle of Blair Mountain.
- September 7 – In Atlantic City, New Jersey, the first Miss America Pageant is held.
- September 8 – Sixteen-year-old Margaret Gorman wins the Atlantic City Pageant's Golden Mermaid trophy; pageant officials later dub her the first Miss America.
- October 8 – The first Sweetest Day is staged in Cleveland, Ohio.
- November 11 – During an Armistice Day ceremony at Arlington National Cemetery, the Tomb of the Unknowns is dedicated by U.S. President Warren G. Harding.
- December 13 – In the Four Power Treaty on Insular Possessions, Japan, the United States, United Kingdom, and France agree to recognize the status quo in the Pacific.
- The DeYoung Museum opens in Golden Gate Park, San Francisco.
- Centre College's football team, led by quarterback Bo McMillin, defeats Harvard University 6–0 to snap Harvard's five-year winning streak. For decades afterward, this is called "football's upset of the century."
- Jewish immigration to Palestine grows rapidly. Before this, Jews preferred the USA, but the USA drastically limited immigration from Eastern Europe.
- The Tau Epsilon Chi Jewish high school sorority is founded in Atlantic City, New Jersey.
- Lochner era (c. 1897–c. 1937)
- U.S. occupation of Haiti (1915–1934)
- Prohibition (1919–1933)
- Depression of 1920–21 (1920–1921)
- Roaring Twenties (1920–1929)
|This section requires expansion. (November 2011)|
- March 27 – Tom Bevill, former US Congressman from Alabama (died 2005)
- March 31 – Peggy Rea, actress (died 2011)
- June 17 – Tony Scott, jazz clarinetist (died 2007)
- July 6 – Nancy Reagan, actress, First Lady of the United States and widow of former United States President Ronald Reagan
- July 18 – John Glenn, astronaut and politician
- August 4 – Herb Ellis, jazz guitarist (died 2010)
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- Media related to 1921 in the United States at Wikimedia Commons
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