|Centuries:||18th century – 19th century – 20th century|
|Decades:||1780s 1790s 1800s – 1810s – 1820s 1830s 1840s|
|Years:||1814 1815 1816 – 1817 – 1818 1819 1820|
Year 1817 (MDCCCXVII) was a common year starting on Wednesday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Monday of the 12-day slower Julian calendar).
Events of 1817
January - March
- January 19 - An army of 5,423 soldiers, led by General José de San Martín, starts crossing the Andes from Argentina to liberate Chile and then Peru.
- February 12 - The Argentine/Chilean patriotic army defeats the Spanish in the Battle of Chacabuco.
- March 3
- March 4 - James Monroe succeeds James Madison as the President of the United States of America.
April - June
- April - Earthquake in Palermo, Italy
- April 3 - Princess Caraboo appears in Almondsbury in Gloucestershire, England.
- April 15 - The first American school for the deaf opens in Hartford, Connecticut.
- April 17 - Martin Van Buren passes Erie Canal bill.
- April 28 - Rush-Bagot Treaty is signed.
- May - The General Convention of the Episcopal Church founded General Theological Seminary while meeting in New York City.
- June 25 - Large prison riot in Copenhagen prison - army is sent for to quell it.
July - September
- July 4 - At Rome, New York, construction on the Erie Canal begins.
- July 18 - Jane Austen, famous author, dies.
- August 22 - City of Araraquara, Brazil founded.
- August 23 - Earthquake near the site of the ancient Greek city of Helike results in 65 deaths.
October - December
- October 31 - Emperor Ninkō accedes to the throne of Japan.
- November 20 - The first Seminole War begins in Florida.
- November 22 - Fredric Cailliaud discovers the old Roman emerald mines at Sikait, Egypt.
- December 10 - Mississippi is admitted as the 20th U.S. state, separated from the Alabama Territory.
- Elgin Marbles are displayed in the British Museum.
- John Kidd extracts naphthalene from coal tar.
- Samuel Taylor Coleridge publishes Biographia Literaria.
- A Typhus epidemic occurs in Edinburgh and Glasgow.
- Outbreak of the Pernambucan Revolt.
|Ab urbe condita||2570|
|British Regnal year||57 Geo. 3 – 58 Geo. 3|
|Chinese calendar|| 丙子年十一月十四日
— to —丁丑年十一月廿四日
|- Vikram Samvat||1873–1874|
|- Shaka Samvat||1739–1740|
|- Kali Yuga||4918–4919|
|- Ǹrí Ìgbò||817–818|
|Japanese calendar|| Bunka 14
|Juche calendar||N/A (before 1912)|
|Julian calendar||Gregorian minus 12 days|
|Minguo calendar||95 before ROC
|Thai solar calendar||2360|
January - June
- January 6 - J. J. McCarthy, Irish architect (d. 1882)
- January 8 - Sir Theophilus Shepstone, British-born South African statesman (d. 1893)
- February 19 - King William III of the Netherlands (d. 1890)
- February 22 - Carl Wilhelm Borchardt, German mathematician (d. 1880)
- March 6 - Clémentine of Orléans, daughter of King Louis-Philippe of France and mother of Tsar Ferdinand I of Bulgaria (d. 1907)
- March 22 - Braxton Bragg, American Confederate general (d. 1876)
- April 15 - Benjamin Jowett, Master of Balliol College (d. 1893)
- May 15 - Debendranath Tagore, Indian philosopher (d. 1905)
- June 30 - Joseph Dalton Hooker, English botanist (d. 1911)
July - December
- July 12 - Henry David Thoreau, American philosopher (d. 1862)
- July 24 - Adolphe, Grand Duke of Luxembourg (d. 1905)
- August 3 - Archduke Albert, Austrian general (d. 1895)
- August 14 - Alexander H. Bailey, American politician (d. 1874)
- August 24 - Aleksey Konstantinovich Tolstoy, Russian writer (d. 1875)
- October 17 - Sir Syed Ahmad Khan (Bahadaur) Founder of the Two Nation Theory for a future Pakistan (d. 1898)
- November 3 - Leonard Jerome, American entrepreneur and grandfather of Sir Winston Churchill (d. 1891)
- November 12 - Bahá'u'lláh, Persian founder of the Bahá'í Faith (d. 1892)
- November 17 - Benjamin Champney, American painter (d. 1907)
- November 30 - Theodor Mommsen, German writer, Nobel Prize laureate (d. 1903)
January - June
- January 12 - Juan Andres, Spanish Jesuit (b. 1740)
- January 16 - Alexander J. Dallas, American statesman and financier (b. 1759)
- April 4 - André Masséna, French marshal (b. 1758)
- April 12 - Charles Messier, French astronomer (b. 1730)
- June 24 - Thomas McKean, American lawyer and signer of the Declaration of Independence (b. 1734)
July - December
- July 14 - Anne Louise Germaine de Staël, French writer (b. 1766)
- July 18 - Jane Austen, English novelist (b. 1775)
- July 19 - John Palmer, Bath architect (b. c. 1738)
- October 16 - Manuel Piar, Venezuelan military leader (b. 1774)
- November 14 - Policarpa Salavarrieta, Colombian spy and revolutionary who worked for the Independence of Colombia (b. 1795)
- November 30 - Jean-Baptiste-Melchior Hertel de Rouville, Canadian politician (b. 1748)
- 12 December - Emperor Tekle Giyorgis I of Ethiopia, (b. about 1751)