Editing 1803 (section)

=== 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)