|Centuries:||18th century – 19th century – 20th century|
|Decades:||1790s 1800s 1810s – 1820s – 1830s 1840s 1850s|
|Years:||1819 1820 1821 – 1822 – 1823 1824 1825|
Year 1822 (MDCCCXXII) was a common year starting on Tuesday (see link for calendar) of the Gregorian calendar (or a common year starting on Sunday of the 12-day-slower Julian calendar).
Events of 1822
- February 9 - The invading Haitian forces led by Jean Pierre Boyer, arrive in Santo Domingo, to overthrow the newly funded Republic.
- May 24 - Battle of Pichincha: Simón Bolívar secures the independence of Quito.
- June 14 - Charles Babbage proposes a Difference engine.
- July 8 - Chippewas turn over huge tract of land in Ontario to the United Kingdom.
- July 13 - Greek War of Independence: Greeks defeat Ottoman forces at Thermopylae.
- July 26 - José de San Martín arrives in Guayaquil, Ecuador, to meet with Simón Bolívar.
- July 27 - Simón Bolívar and general José de San Martín meet in Guayaquil. Bolívar later annexes Guayaquil. (See Guayaquil conference)
- July 28 - Independence Day in Peru (see History of Peru).
- July 31 - Last public whipping in Edinburgh.
- August 12 - St David's College (now the University of Wales, Lampeter) founded by Bishop Thomas Burgess.
- August 22 - The English ship Orion landed at Yerba Buena, now named San Francisco, under the command of William A. Richardson
- September 7 - Brazil declares its independence from Portugal (see Brazilian independence).
- September 16 - George Canning appointed British Secretary of State for Foreign Affairs.
- September 22 - Portugal approves its first Constitution.
- October 12 - Peter I of Brazil declared constitutional emperor of the Brazilian Empire.
- October- December - Congress of Verona at which Russia, Austria and Prussia approve French intervention in Spain.
- November 13 - Greek War of Independence: Nafplion falls to the Greek rebels.
- December 1 - Peter I is crowned as Emperor of Brazil (see The reign of Pedro I, 1822-31.)
- Hieroglyphs deciphered by Thomas Young and Jean-François Champollion using the Rosetta Stone.
- Galileo Galilei's Dialogue taken off the Index Librorum Prohibitorum, the Roman Catholic Church's list of banned books.
- Ashley's Hundred leave from St. Louis setting off a major increase in fur trade.
- An earthquake in Chile raises the coastal area.
- Coffee ban in Sweden abolished.
- Britain repeals death penalty for over 100 crimes. (See Capital punishment in the United Kingdom).
- First group of freed slaves from USA arrive to modern-day Liberia and founded Monrovia. (See History of Liberia.)
- Graham Cracker developed in Bound Brook, New Jersey by Presbyterian minister Rev. Sylvester Graham.
- Gist Masion is built in Wellsburg, West Virginia, which some 100 years later is used for the Brooke Hills Spooktacular.
|Ab urbe condita||2575|
|British Regnal year||2 Geo. 4 – 3 Geo. 4|
|Chinese calendar|| 辛巳年十二月初九日
— to —壬午年十一月十九日
|- Vikram Samvat||1878–1879|
|- Shaka Samvat||1744–1745|
|- Kali Yuga||4923–4924|
|- Ǹrí Ìgbò||822–823|
|Japanese calendar|| Bunsei 5
|Juche calendar||N/A (before 1912)|
|Julian calendar||Gregorian minus 12 days|
|Minguo calendar||90 before ROC
|Thai solar calendar||2365|
- January 2 - Rudolf Clausius, German physicist (d. 1888)
- January 6 - Heinrich Schliemann, German archaeologist (d. 1890)
- January 28 - Alexander Mackenzie, second Prime Minister of Canada (d. 1892)
- February 4 - Edward Fitzgerald Beale, American Navy Lieutenant and explorer
- February 16 - Sir Francis Galton, English explorer and biologist (d. 1911)
- March 4 - Jules Antoine Lissajous, French mathematician (d. 1880)
- April 3 - Edward Everett Hale, American writer (d. 1909)
- April 27 - Ulysses S. Grant, 18th President of the United States (d. 1885)
- May 20 - Frédéric Passy, French economist, recipient of the Nobel Peace Prize (d. 1912)
- May 26 - Edmond de Goncourt, French writer (d. 1896)
- June 10 - John Jacob Astor III, American businessman (d. 1890)
- July 18 - Princess Augusta of Cambridge (d. 1916)
- July 20 - Gregor Mendel, Czech geneticist (d. 1884)
- October 4 - Rutherford B. Hayes, 19th President of the United States (d. 1893)
- December 10 - César Franck, Belgian composer and organist (d. 1890)
- December 24 - Matthew Arnold, English poet (d. 1888)
- December 27 - Louis Pasteur, French microbiologist and chemist (d. 1895)