1803

Events from the year 1803 in the United States.
==Incumbents==
===Federal Government===
* President: Thomas Jefferson (DR-VA)
* Vice President: Aaron Burr (DR-NY)
* Chief Justice: John Marshall (VA)
* Speaker of the House of Representatives: Nathaniel Macon (DR-NC)
* Congress: 7th (until March 4), 8th (starting March 4)
==Events==
* January 30 – Monroe and Livingston sail for Paris to discuss, and possibly buy, New Orleans; they end completing the Louisiana Purchase.
* February 24 – Marbury v. Madison: The Supreme Court of the United States establishes the principle of judicial review.
* March 1 – Ohio admitted becomes the 17th U.S. state, retroactive from August 7, 1953.
* April 30 – Louisiana Purchase is made by the United States from France.
* July 4 – The Louisiana Purchase is announced to the American people.
* October 20 – The Senate ratifies the Louisiana Purchase Treaty, doubling the size of the United States.
* November 30 – At the Cabildo building in New Orleans, Spanish representatives Governor Manuel de Salcedo and the Marqués de Casa Calvo, officially transfer Louisiana (New Spain) to French representative Prefect Pierre Clément de Laussat. Barely three weeks later, on December 20, France transfers the same land to the United States as the Sale of Louisiana.
==Memoriam==
* February 22 – Jacques-Donatien Le Ray de Chaumont, "Father of the American Revolution" (aged 76; France)
* May 14 – William Smith, Episcopalian priest, educator, theologian, poet and historian (aged 75; Philadelphia, PA, USA)
* June 24 – Matthew Thornton, signatory of the Declaration of Independence (aged 89; Newburyport, MA, USA)
* September 13 – John Barry, first commissioned U.S. naval officer (aged 58; Philadelphia, PA, USA)
* September 27 – Frances Brett Hodgkinson, actress (aged 32; Philadelphia, PA, USA)
* October 2 – Samuel Adams, a Founding Father of the U.S. (aged 81; Cambridge, MA, USA)
* December 8 – William Verstille, portrait artist (aged 46; Boston, MA, USA)
==External links==
* 1803 in the United States
Category:United States History: Volume 3