Editing 1823 (section)

=== January–June ===
[[File:Wilhelm Siemens.jpg|thumb|right|110px|[[Carl Wilhelm Siemens]]]]
[[File:Sultan Abdülmecid - Google Art Project.jpg|thumb|right|110px|[[Abdülmecid I]]]]
* [[January 1]] – [[Sándor Petőfi]], Hungarian poet, revolutionary (d. 1849)
* [[January 3]] – [[Robert Whitehead (engineer)|Robert Whitehead]], English engineer, inventor (d. 1905)
* [[January 8]] – [[Alfred Russel Wallace]], British naturalist, biologist (d. 1913)
* [[January 11]] – [[Pierre Philippe Denfert-Rochereau]], French military officer and politician (d. 1878)
* [[January 27]] – [[Édouard Lalo]], French composer (d. 1892)
* [[February 15]] – [[Li Hongzhang]], Chinese politician, general and diplomat (d. 1901)
* [[February 28]]
** [[Frederick Francis II, Grand Duke of Mecklenburg-Schwerin]] (d. 1883)
** [[Ernest Renan]], French philosopher, philologist, historian and writer (d. 1892)
* [[March 3]] – [[John George Adair]], Scots-Irish businessman and landowner; also known as "Black Jack" for his eviction of 244 people in 1861; financier of [[JA Ranch]] (d. 1885)
* [[March 8]] – [[Gyula Andrássy]], 4th Prime Minister of Hungary (d. 1890)
* [[March 14]] – [[Théodore de Banville]], French writer (d. 1891)
* [[March 18]] – [[Antoine Chanzy]], French general and colonial governor (d. 1883)
* [[April 1]] – [[Simon Bolivar Buckner]], American soldier, politician and Confederate soldier (d. 1914)
* [[April 3]] – [[William M. Tweed]], American political boss (d. 1878)
* [[April 4]] – [[Carl Wilhelm Siemens]], German engineer (d. 1883)
* [[April 24]] – [[Sebastián Lerdo de Tejada]], 27th President of Mexico (d. 1889)
* [[April 25]] – [[Abdülmecid I]], [[Ottoman Sultan]] (d. 1861)
* [[May 2]] – [[Emma Hardinge Britten]] (b. Emma Floyd), English-born spiritualist (d. 1899)
* [[May 9]] – [[Frederick Weld|Sir Frederick Weld]], 6th Prime Minister of New Zealand (d. 1891)
* [[May 15]]
** [[Thomas Lake Harris]], American poet (d. 1906)
** [[Youssef Bey Karam]], [[Lebanon|Lebanese]] nationalist leader (d. 1889)<ref>{{Cite web |url=https://www.ehdenfamilytree.org/getperson.php?personID=I1&tree=ehden |title=Youssef Bey Karam on Ehden Family Tree website |access-date=April 2, 2019 |archive-date=March 29, 2019 |archive-url=https://web.archive.org/web/20190329220258/https://www.ehdenfamilytree.org/getperson.php?personID=I1&tree=ehden |url-status=dead }}</ref>
* [[May 17]] – [[Henry Eckford (horticulturist)|Henry Eckford]], British horticulturist (d. 1905)
* [[May 22]] – [[Solomon Bundy]], American politician (d. 1889)
* [[May 26]] – [[William Pryor Letchworth]], American businessman, philanthropist, founder of [[Letchworth State Park]], New York
* [[July 6]] – [[Sophie Adlersparre]], Swedish feminist (d. 1895)
* [[June 21]] – [[Jean Chacornac]], French astronomer (d. 1873)