1781 was a common year starting on Monday (see link for calendar).

Events

• January 5 - American Revolutionary War: Richmond, Virginia is burned by British naval forces led by Benedict Arnold.
• January 30 - Articles of Confederation ratified by 13th state, Maryland.
• January - William Pitt the Younger, later Prime Minister, enters Parliament.
• March 1 - American Continental Congress implements the Articles of Confederation.
• March 13 - Sir William Herschel discovers the planet Uranus. Originally he calls it Georgium Sidus (George's Star) in honour of King George III of England.
• March 15 - American Revolutionary War: American General Nathanael Greene loses Battle of Guilford Court House to British.
• August 30 - American Revolutionary War: French fleet under Comte de Grasse enters Chesapeake Bay, cutting British General Charles Cornwallis off from escape by sea.
• September 4 - Los Angeles is founded as El Pueblo de Nuestra Senora La Reina de Los Angeles de Porciuncula (City of the Queen of the Angels) by a group of 44 Spanish settlers.
• September 5 - British fleet under Thomas Graves arrives and fights de Grasse, but to no effect.
• September 6 - The British army attacks a fort in Groton, Connecticut which became known as the Battle of Groton Heights.
• September 10 - Graves gives up trying to break through the now-reinforced French fleet and returns to New York, leaving Cornwallis to his fate.
• October 19 - General Charles Cornwallis surrenders at Yorktown, Virginia, ending the armed struggle of the American Revolutionary War.
• November 5 - John Hanson is elected President of the Continental Congress.
• December 12 - French and British fleets fight in the Second Battle of Ushant.
• Bank of North America is chartered by the Continental Congress.
• Charles Messier publishes final catalog of Messier objects.
• Carl Wilhelm Scheele discovers tungsten.
• Immanuel Kant publishes Critique of Pure Reason.
• Jeremy Bentham formulates utilitarian ethics.
• Reverend Samuel Peters publishes General History of Connecticut, using the term blue law for the first time.
• Antonio Salieri selected as music teacher of Princess of Württemberg over Mozart.

Births

• January 26 - Achim von Arnim, poet (+ 1831)
• January 30 - Adelbert von Chamisso, poet, botanist (+ 1838)
• February 17 - Rene Theophile Hyacinthe Laennec, French physician, inventor of stethoscope (+ 1826)
• March 4 - Rebecca Gratz, American educator, philanthropist (+ 1869)
• March 13 - Karl Friedrich Schinkel, master builder (+ 1841)
• April 2 - Bhagwan Shree Swaminarayan aka Shree Sahajanand Swami aka Ghanshyam Maharaj , manifestation of Almighty God (+ 1830)
• June 9- George Stephenson (+ 1848)
• June 21 - Siméon-Denis Poisson, French mathematician, physicist (+ 1840)
• July 6 - Thomas Stamford Raffles, founder of Singapore (+ 1826)
• July 6 - John D. Sloat, American naval officer (+ 1867)
• September 3 - Eugène de Beauharnais, son of Napoleon’s wife, Josephine
• September 6 - Anton Diabelli, music publisher, editor, composer
• October 1 - James Lawrence, Captain of the United States Navy known for his success fulactivities during the War of 1812.
• November 6 - Lucy Aikin, English writer (+ 1864)
• November 20 - Karl Friedrich Eichhorn, German jurist (+ 1854)
• November 30 - Alexander Berry (d. 1873) Scottish adventurer, founder of Berry Australia
• December 11 - Sir David Brewster, Scottish physicist (+ 1868)
• William Williams of Wern, minister (+ 1840)

Deaths

• March 18 - Anne Robert Jacques Turgot, Baron de Laune, French statesman, economist
• July 18 - Padre Francisco Garcés, Spanish missionary (killed)
• Peter Scheemakers, Flemish sculptor
• James Abercromby, British general