Editing 1857 (section)

=== January&ndash;June ===
* [[January 27]] &ndash; [[Dorothea Lieven]],  Baltic-German diplomat in Russian services (b. [[1785]]) 
* [[February 10]] &ndash; [[David Thompson (explorer)|David Thompson]], British-Canadian explorer (b. [[1770]])
* [[February 15]] &ndash; [[Mikhail Glinka]], Russian composer (b. [[1804]])<ref>{{cite book|author=James M Keller|title=Chamber Music: A Listener's Guide|publisher=Oxford University Press|year=2011|isbn=9780195382532|page=202}}</ref>
* [[February 16]] &ndash; [[Elisha Kent Kane]], American explorer of the Arctic regions (b. [[1820]])
* [[March 9]] &ndash; [[Dominic Savio]], Italian adolescent saint (b. [[1842]])
* [[March 11]] &ndash; [[Manuel José Quintana]], Spanish poet (b. [[1772]])
* [[March 19]] &ndash; [[William Henry Playfair]], Scottish architect (b. [[1790]])<ref>{{Cite ODNB|url=http://www.oxforddnb.com/view/10.1093/ref:odnb/9780198614128.001.0001/odnb-9780198614128-e-22371|title=Playfair, William Henry (1790–1857), architect|last=McKean|first=Charles|year=2004|isbn=|location=|pages=|language=en|doi=10.1093/ref:odnb/22371}}</ref>
* [[April 8]] &ndash; [[Mangal Pandey]], Indian soldier (executed; b. 1827)<ref>{{cite book|first=Kim A. |last=Wagner|pages=87|title=The Great Fear of 1857. Rumours, Conspiracies and the Making of the Indian Uprising|date=May 31, 2024 |publisher=Dev Publishers & Distributors |isbn=978-93-81406-34-2}}</ref>
* [[May 2]] &ndash; [[Alfred de Musset]], French poet (b. [[1810]])<ref>{{cite book|author=Alfred de Musset|title=Twelve Plays|publisher=E. Mellen Press|year=2001|isbn=9780773474161|page=1}}</ref>
* [[May 11]] &ndash; [[Eugène François Vidocq]], French criminal, private detective (b. [[1775]])
* [[May 13]] &ndash; [[Parley P. Pratt]], early American [[Latter Day Saint movement]] leader (murdered) (b. [[1807]])
* [[May 16]] &ndash; [[Vasily Tropinin]], Russian Romantic painter (b. [[1776]])
* [[May 23]] &ndash; [[Augustin-Louis Cauchy]], French mathematician (b. [[1789]])
* [[May 29]] &ndash; [[Agustina de Aragón]], Spanish heroine (b. [[1786]]){{cite Q|Q115393061)|editor1=Henry Gardiner Adams}}
* [[June 10]] &ndash; [[John de Barth Walbach|John Walbach]], French baron and officer in the [[United States Army]], with a military career spanning over 57 years (b. [[1766]])
* [[June 30]] &ndash; [[Alcide d'Orbigny]], French naturalist (b. [[1802]])