|Covid-19|President: George Washington (no political party-Virginia)
Vice President: John Adams (F-Massachusetts)
Chief Justice: John Jay (New York)
Speaker of the House of Representatives: Frederick Muhlenberg (Pro-Admin.-Pennsylvania) (until March 4), Jonathan Trumbull, Jr. (Pro-Admin.-Connecticut) (starting October 24)
Congress: 1st (until March 4), 2nd (starting March 4)
March 4 – Vermont is admitted as the 14th U.S. state (see History of Vermont).
March 9 – Pierre Charles L'Enfant arrives in Georgetown and begins designing the federal capital city.
March 30 – District of Columbia is established.
August 26 – John Fitch is granted a patent for the steamboat in the United States.
September 9 – Washington, D.C. is officially named.
September 25 – Mission Santa Cruz is founded by Father Fermín Francisco de Lasuén, becoming the 12th mission in the California mission chain.
October 9 – Mission Nuestra Señora de la Soledad is founded by Father Fermín Francisco de Lasuén, becoming the 13th mission in the California mission chain.
December 15 – Ratification by the states of the first ten amendments to the United States Constitution is completed, creating the United States Bill of Rights. Two additional amendments remain pending, and one of these is finally ratified in 1992, becoming the Twenty-seventh Amendment.
The first American ship reaches Japan.
An ordinance is written barring the game of baseball within 80 yards of the Meeting House in Pittsfield, Massachusetts (first known reference to the game of baseball in North America).
Northwest Indian War (1785–1795)
February 4 – John McClean, United States Senator from Illinois from 1824 till 1825 and from 1829 till 1830. (died 1830)
April 23 – James Buchanan, 15th President of the United States from 1857 till 1861. (died 1868)
July 18 – Isaac D. Barnard, United States Senator from 1827 till 1831. (died 1834)
October 24 – Joseph R. Underwood, United States Senator from Kentucky from 1847 till 1853. (died 1876)
November 27 – Truman Smith, United States Senator from Connecticut from 1849 till 1854. (died 1884)
April 24 – Benjamin Harrison V Signer of Declaration of Independence, father of President William Henry Harrison, great-grandfather of President Benjamin Harrison (born 1726)
John Roth Prussian clergyman (born 1726 in Prussia)
1791 in the United States Wikipedia
Events from the year 1791 in the United States.