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|Centuries:||18th century – 19th century – 20th century|
|Decades:||1780s 1790s 1800s – 1810s – 1820s 1830s 1840s|
|Years:||1811 1812 1813 – 1814 – 1815 1816 1817|
|1814 in topic:|
|Archaeology – Architecture – Art – Literature – Music|
|Australia – Canada – France – Germany – Mexico – Philippines – South Africa – US – UK|
|Rail Transport – Science – Sports|
|Lists of leaders|
|Colonial Governors – State leaders|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Ab urbe condita||2567|
|British Regnal year||54 Geo. 3 – 55 Geo. 3|
— to —甲戌年十一月二十日
|- Vikram Samvat||1870–1871|
|- Shaka Samvat||1736–1737|
|- Kali Yuga||4915–4916|
|- Ǹrí Ìgbò||814–815|
|Japanese calendar||Bunka 11
|Juche calendar||N/A (before 1912)|
|Julian calendar||Gregorian minus 12 days|
|Minguo calendar||98 before ROC
|Thai solar calendar||2357|
|Wikimedia Commons has media related to: 1814|
Year 1814 (MDCCCXIV) was a common year starting on Saturday (link will display the full calendar) of the Gregorian calendar and a common year starting on Thursday of the 12-day slower Julian calendar.
- January 14 – Denmark cedes Norway to Sweden in exchange for west Pomerania, as part of the Treaty of Kiel.
- January 29 – Battle of Brienne: Emperor Napoleon I of France is victorious against von Blücher.
- January 31 – Gervasio Antonio de Posadas becomes Supreme Director of Argentina.
- February – George Hamilton-Gordon, 4th Earl of Aberdeen, represents Britain at the Congress of Chatillon.
- February 1 – Lord Byron's semi-autobiographical tale in verse The Corsair is published by John Murray in London and sells 10,000 copies on this day.
- February 11 – Norway's independence is proclaimed, marking the ultimate end of the Kalmar Union.
- February 12 – A fire destroys the Custom House, London.
- February 14 – Battle of Vauchamps: Napoleon I of France is victorious against von Blücher.
- February 18 – Battle of Montereau: Napoleon is victorious against Austrian forces.
- February 21 – Great Stock Exchange Fraud in London.
- March 7 – Battle of Craonne: Napoleon is victorious against von Blücher.
- March 9 – The USS Enterprise reaches Wilmington, North Carolina, returning from the Caribbean.
- March 10 – Battle of Laon: von Blücher defeats Napoleon.
- March 12 – Louis-Antoine, Duke of Angoulême enters Bordeaux, marking the restoration of the Bourbon dynasty.
- March 25 – De Nederlandsche Bank is established.
- March 27 – War of 1812 – Battle of Horseshoe Bend: In northern Alabama, United States forces under General Andrew Jackson defeat the Creek Indians.
- March 30 – Napoleonic Wars: Sixth Coalition forces march into Paris.
- March 31 – Anti-Napoleonic troops occupy Paris.
- April 6 – Bourbon Restoration: Louis XVIII is invited to occupy the restored French throne.
- April 10 – The Duke of Wellington wins the Battle of Toulouse.
- April 11 – Napoleon abdicates unconditionally as Emperor of the French.
- April 12 – The Royal Norwegian Navy is re-established.
- May 3 – The Duke of Provence, the future Louis XVIII of France, returns to Paris.
- May 5 – British-American War (War of 1812): The British attack Fort Ontario at Oswego, New York.
- May 17 – The Constitution of Norway is signed and the Danish Crown Prince Christian Frederik is elected King of Norway by the Norwegian Constituent Assembly.
- May 17 – The occupation of Monaco changes from French to Austrian hands.
- May 30 – The First Treaty of Paris is signed returning France's borders to their 1792 extent. Napoleon is exiled to Elba on the same day.
- July 5 – War of 1812 – Battle of Chippawa: American Major General Jacob Brown defeats British General Phineas Riall at Chippawa, Ontario.
- July 24 – War of 1812: General Phineas Riall advances toward Niagara Falls, Ontario to halt Jacob Brown's American invaders.
- July 25
- George Stephenson tests his first locomotive Blucher successfully in England.
- War of 1812 – Battle of Lundy's Lane: Reinforcements arrive near Niagara Falls, Ontario for General Riall's British and Canadian force, and a bloody, all-night battle with Jacob Brown's Americans commences at 1800 hours; Americans retreat to Fort Erie.
- August 7 – Pope Pius VII decrees the bull Sollicitudo omnium ecclesiarum reestablishing the Society of Jesus (Jesuits) all over the world, after having approved their survival and existence in Russia.
- August 12 – In England, the last hanging under the Black Act is carried out, of William Potter for cutting down an orchard (although the judge petitioned for reprieve).
- August 13 – The Anglo-Dutch Treaty of 1814 is signed.
- August 24 – War of 1812: British troops occupy Washington, D.C., setting numerous buildings on fire, including the Capitol.
- August 28 – Alexandria, Virginia, offers surrender to the British fleet without a fight.
- September 11 – War of 1812 – Battle of Lake Champlain: An American squadron under Thomas Macdonough defeats the British squadron, ultimately forcing the invading army to retreat back into Canada.
- September 13 – War of 1812: The British bombard Fort McHenry at Baltimore. The British failure at the Battle of Baltimore is a turning point in the war, and the American defense of the fort inspires Francis Scott Key to compose the poem later set to music as The Star-Spangled Banner.
- October 17 – London Beer Flood: A large vat full of porter (beer) owned by Meux's Brewery of London bursts, demolishing buildings and killing nine.
- November 7 – War of 1812: Andrew Jackson seizes Pensacola, Florida.
- November – Congress of Vienna: The settling of the many issues arising from the French Revolutionary Wars, the Napoleonic Wars, and the dissolution of the Holy Roman Empire.
- December 15 – The Hartford Convention is convened by members of the American Federalist Party.
- December 24 – War of 1812: The Treaty of Ghent is signed, officially ending the war.
- December 25 – Samuel Marsden of the Church Missionary Society preaches the first sermon in New Zealand at Oihi
Date unknown 
- Missionaries attempt to write down the Māori language.
- The world's first complex machine mass-produced from interchangeable parts, Eli Terry's wooden pillar-and-scroll clock, comes off the production line in Plymouth, Connecticut.
- Sir Walter Scott writes Waverley.
- Guyana is transferred from the Netherlands to Britain as part of the Anglo-Dutch Treaty of 1814; it is renamed British Guiana.
- January 1 – Hong Xiuquan, Chinese rebel (d. 1864)
- January 27 – Eugène Viollet-le-Duc, French architect (d. 1879)
- February 18 – Samuel Fenton Cary, American politician and temperance activist (d. 1900)
- March 9 – Taras Shevchenko, Ukrainian poet (d. 1861)
- April 3 – Lorenzo Snow, fifth president of The Church of Jesus Christ of Latter-day Saints (d. 1901)
- April 21 – Angela Burdett-Coutts, 1st Baroness Burdett-Coutts, English philanthropist (d. 1906)
- May 12 – Adolf von Henselt, German composer
- May 26 – Heinrich Geißler, German physicist (d. 1879)
- May 30 – Mikhail Bakunin, Russian anarchist (d. 1876)
- July 19 – Samuel Colt, American gun maker (d. 1862)
- August 8 – Esther Morris, American suffragist and judge (d. 1902)
- August 10 – Henri Nestlé, German-born Swiss chocolate magnate (d. 1890)
- August 13 – Anders Jonas Ångström, Swedish physicist (d. 1874)
- August 23 – James Roosevelt Bayley, first Bishop of Newark, New Jersey, and the eighth Archbishop of Baltimore (d. 1877)
- August 28 – Sheridan Le Fanu, Irish writer (d. 1873)
- September 2 – Ernst Curtius, German archaeologist and historian (d. 1896)
- September 8 – Charles Étienne Brasseur de Bourbourg, French writer and historian (d. 1874)
- September 27 – Daniel Kirkwood, astronomer (d. 1895)
- October 4 – Jean-François Millet, French painter (d. 1875)
- October 7 – Susanna Dickinson, survivor of the Alamo
- October 15 – Mikhail Lermontov, Russian writer (d. 1841)
- November 6 – Adolphe Sax, Belgian instrument maker and inventor (d. 1894)
- November 13 – Joseph Hooker, American general (d. 1879)
- November 22 – Serranus Clinton Hastings, American politician (d. 1893)
- December 18 – Sarah Tittle Bolton née: Barrett, American poet (d. 1893)
- December 13 – Ana Néri, Brazilian nurse, matron of nursing in that country (d. 1880)
- date unknown:
- January 7 – Ira Allen, founder of Vermont and leader of the Green Mountain Boys (born 1751)
- January 27
- March 26 – Joseph-Ignace Guillotin, French inventor (born 1738)
- April 1 – Joseph de Ferraris, Austrian cartographer of the Austrian Netherlands (born 1726)
- April 12 – Charles Burney, English music historian (born 1726)
- April 19 – Thomas Brudenell-Bruce, 1st Earl of Ailesbury, English earl (born 1729)
- May 5 – Abdullah I Al-Sabah, Kuwait ruler (born 1740)
- May 6 – Stephen Amherst, English cricketer (born 1750)
- May 27 – Ivan Akimov, Russian painter (born 1754)
- May 29 – Joséphine de Beauharnais, Empress of France (born 1763)
- June 14 – Antin Angelovych, Greek-Catholic metropolitan (born 1756)
- July 12 – William Howe, 5th Viscount Howe, British general
- July 18 – Miles Peter Andrews, English playwright and legislator (born 1742)
- July 19 – Captain Matthew Flinders, English explorer of the coasts of Australia (b. 1774)
- August 21
- August 28 – Erik Must Angell, Norwegian jurist and politician (born 1744)
- August 31 – Arthur Phillip, British admiral and first governor of New South Wales (b. 1738)
- September 8 – Maria Carolina of Austria, queen of Ferdinand I of the Two Sicilies, and de facto ruler (b. 1752)
- October 4 – Samuel Jackson Pratt, British writer, poet and actor (b. 1749)
- October 19 – Mercy Otis Warren, American playwright (b. 1728)
- November 18 – Aleijadinho, Colonial Brazil-born sculptor and architect (b. 1730 or 1738)
- November 23 – Elbridge Gerry, 5th Vice President of the United States (b. 1744)
- December 2 – Donatien Alphonse Francois de Sade, French writer (b. 1740)
- December 13 – Charles-Joseph, 7th Prince of Ligne, Austrian field marshal (b. 1735)
- December 19 – Joseph Bramah, inventor of the hydraulic press (b. 1748)
- Jones, Neal T., ed. (1984). A Book of Days for the Literary Year. London; New York: Thames and Hudson. ISBN 0-500-01332-2.
- Muir, Diana. "Chapter 10". Reflections in Bullough's Pond: Economy and Ecosystem in New England. Lebanon, New Hampshire: University Press of New England. ISBN 978-0-87451-909-9.