Editing 1803 (section)

== Births ==
=== January–June ===
[[File:Ralph_Waldo_Emerson_ca1857_retouched.jpg|thumb|right|110px|[[Ralph Waldo Emerson]]]]
[[File:Justus von Liebig NIH.jpg|thumb|right|110px|[[Justus von Liebig]]]]
[[File:Osgood Johnson.png|thumb|right|110px|[[Osgood Johnson]]]]
* [[February 2]] – [[Albert Sidney Johnston]], American Confederate general (d. 1862)
* [[February 4]] – [[Antonija Höffern]], Slovene noblewoman and educator (d. 1871)<ref>{{Cite web |last=Glonar |first=Joža |date=2013 |title=Höffern, Antonija, pl. (1803–1871) |url=https://www.slovenska-biografija.si/oseba/sbi233529/ |access-date=May 5, 2023 |website=Slovenian Biographical Lexicon |publisher=[[Slovenian Academy of Sciences and Arts]] |language=sl |archive-date=May 5, 2023 |archive-url=https://web.archive.org/web/20230505224444/https://www.slovenska-biografija.si/oseba/sbi233529/ |url-status=live }}</ref>
* [[February 15]]
** [[Karl Friedrich Schimper]], German botanist, naturalist and poet (d. 1867)
** [[John Sutter]], German-American pioneer (d. 1880)
* [[February 26]] – [[Arnold Adolph Berthold]], German physiologist, zoologist (d. 1861)
* [[March 12]] – [[Guillaume de Felice]], Savoy nobleman, abolitionist (d. 1871)
* [[March 13]] – [[John Boyle (MP)|John Boyle]], British politician (d. 1874)
* [[March 16]] – [[Nikolay Yazykov]], Russian poet, Slavophile (d. 1846)
* [[March 27]] – [[Charles Lafontaine]], Swiss mesmerist (d. [[1892]])
* [[April 7]] – [[Flora Tristan]], French feminist (d. 1844)
* [[April 30]]
** [[Jeremiah E. Cary]], American politician (d. 1888)
** [[Albrecht von Roon]], [[Prime Minister of Prussia]] (d. 1879)
* [[May 12]] – [[Justus von Liebig]], German chemist (d. 1873)
* [[May 20]] – [[Ann Walker (landowner)|Ann Walker]], English landowner and philanthropist (d. 1854)
* [[May 24]] – [[Charles Lucien Bonaparte]], French naturalist, ornithologist (d. 1857)
* [[May 25]]
** [[Edward Bulwer-Lytton]], English novelist, playwright and politician (d. 1873)
** [[Ralph Waldo Emerson]], American writer (d. 1882)
* [[June 8]] – [[Amalia Assur]], Swedish dentist (d. 1889)
* [[June 24]] – [[George James Webb]], English-born composer (d. 1887)

=== July–December ===
[[File:Christian Doppler.jpg|thumb|right|110px|[[Christian Doppler]]]]
[[File:SusannahMoodie.jpeg|thumb|right|110px|[[Susannah Moodie]]]]
[[File:Gottfried-semper.jpg|thumb|right|110px|[[Gottfried Semper]]]]
[[File:Polk sarah.jpg|thumb|right|110px|[[Sarah Childress Polk]]]]
[[File:Hector Berlioz Crop.jpg|thumb|upright|110px|[[Hector Berlioz]]]]
* [[July 10]] – [[William Todd (1803–1873)]], American businessman, Canadian senate nominee
* [[July 20]] – [[John Hymers]], English mathematician (d. 1887)
* [[July 24]] – [[Adolphe Adam]], French composer (d. 1856)
* [[July 31]] – [[John Ericsson]], Swedish inventor, engineer (d. 1889)
* [[August]] – [[Francesca Anna Canfield]], American linguist, poet and translator (d. [[1833]])<ref name="WoodworthMorris1834">{{cite book|last1=Woodworth|first1=Samuel|last2=Morris|first2=George Pope|last3=Willis|first3=Nathaniel Parker|title=The New York Mirror: A Weekly Gazette of Literature and the Fine Arts|url=https://books.google.com/books?id=XL0iAQAAMAAJ&pg=PA22|edition=Public domain|volume=12|year=1834|publisher=G. P. Morris|pages=22–|access-date=September 15, 2018|archive-date=December 7, 2023|archive-url=https://web.archive.org/web/20231207120851/https://books.google.com/books?id=XL0iAQAAMAAJ&pg=PA22#v=onepage&q&f=false|url-status=live}}</ref>
* [[August 3]]
** [[Mary Dominis|Mary Dominus]], American settler of Hawaii (d. 1889)
** Sir [[Joseph Paxton]], English gardener, architect and Member of Parliament (d. 1865)
* [[August 10]] – [[Joseph Vinoy]], French general (d. 1880)
* [[August 13]] – [[Vladimir Odoyevsky]], Russian philosopher, writer, music critic (d. 1869)
* [[August 18]] – [[Nathan Clifford]], American politician, [[Associate Justice of the Supreme Court of the United States]] (d. 1881)
* [[August 23]] 
** [[Jan Erazim Vocel]], Czech poet, archaeologist, historian and cultural revivalist (d. 1871)
** [[Gustaf Wappers]], Belgian painter (d. 1874)
* [[August 27]] – [[Edward Beecher]], American theologian (d. 1895)
* [[September 4]]
** [[Anna Nielsen (1803–1856)|Anna Nielsen]], Danish mezzo-soprano (d. 1856)
** [[Sarah Childress Polk]], [[First Lady of the United States]] (d. 1891)
* [[September 11]] – [[Francisca Zubiaga y Bernales]], first lady of Peru, controversial socialite (d. 1835)
* [[September 27]] – [[Samuel Francis Du Pont]], American admiral (d. 1865)
* [[September 28]] – [[Prosper Mérimée]], French writer (d. 1870)
* [[September 29]] – [[Mercator Cooper]], American sea captain (d. 1872)
* [[September 30]] – [[Gustav von Alvensleben]], Prussian general (d. 1881)
* [[October 5]] – [[Friedrich Bernhard Westphal]], Danish-German painter (d. 1844)
* [[October 16]] – [[Robert Stephenson]], English civil engineer (d. 1859)
* [[November 11]] – [[Adolf von Bonin]], Prussian general (d. 1872)
* [[November 14]] – [[Jacob Abbott]], American writer (d. 1879)
* [[November 29]]
** [[Christian Doppler]], Austrian mathematician (d. 1853)
** [[Gottfried Semper]], German architect (d. 1879)
* [[December 5]] – [[Fyodor Tyutchev]], great Russian Romantic poet (d. 1873)
* [[December 6]] – [[Susanna Moodie]], English writer (d. 1885)
* [[December 11]] – [[Hector Berlioz]], French composer (d. 1869)

=== Date unknown ===
*[[Barbarita Nieves]], Venezuelan mistress of [[José Antonio Páez]] (d. [[1847]])