- Jan 6 Fanny Burney, English novelist and diarist (b. 1752)
- Jan 22 Johann Friedrich Blumenbach, German anthropologist (b. 1752)
- Mar 2 Heinrich Olbers, German astronomer (comets & asteroids), dies at 81
- Mar 2 Wilhelm Olbers, German astronomer and physician, discovered asteroids (Pallas & Vesta), dies at 81
- Mar 12 Friedrich Westenholz, composer, dies at 61
- Mar 22 Étienne Bobillier, French mathematician, dies at 41
- Mar 23 William Maclure, Scottish-American Geologist (first geological map), dies at 76
- Mar 28 Simon-Antoine-Jean Lhuillier, Swiss mathematician, dies at 89
- Mar 30 George (Beau) Brummell, Dandy, dies
- Apr 19 Jean-Jacques Lartigue, Roman catholic bishop of Montreal (b. 1777)
- Apr 25 Siméon-Denis Poisson, French mathematician (b. 1781)
- May 5 Gottlob Benedikt Bierey, composer, dies at 67
- May 5 Matthaus Fischer, composer, dies at 76
- May 6 Francisco de Paula Santander, Colombian president and independence leader (b. 1792)
- May 7 Caspar David Friedrich, German painter (b. 1774)
- May 26 Sidney Smith, British admiral (b. 1764)
- May 27 Niccolo Paganini, Italian composer and violin virtuoso (Princess Lucca), dies at 57
- May 30 Dominique J de Eerens, gov-gen of Dutch-Indies, dies at 59
- Jun 6 Marcellin Champagnat, French priest (b. 1789)
- Jun 7 Frederik Willem III, King of Prussia (1797-1840), dies at 69
- Jun 19 John Cockerill, English/Belgian industrial/orangist, dies at 50
- Jun 25 Leopold count of Limburg Stirum, Dutch general and politician, dies at 82
- Jun 29 Lucien Bonaparte, prince of Canino/Musignano, dies at 65
Karl Ferdinand von Graefe
Jul 4 Karl Ferdinand von Graefe, German surgeon who helped create modern plastic surgery dies at 53
Karl Ferdinand von Graefe
- Jul 22 Josef Jawurek, composer, dies at 83
- Jul 23 Frantisek Max Knize, composer, dies at 55
- Aug 18 Antony CW Staring, Dutch patriot/poet (Jaromir), dies at 73
- Aug 24 Joseph Waast Aubert Nonot, composer, dies at 89
- Aug 25 Karl Leberecht Immermann, German writer, dies at 44
- Aug 27 William Kneass, 3rd US chief engraver (1824-40), dies in office
- Sep 8 John H van de Palm, theologist/literature/speaker, dies at 77
- Sep 15 Franz Xaver Pechacek, composer, dies at 47
- Sep 22 Princess Augusta Sophia of the United Kingdom, dies at 71
- Sep 25 Jacques-Etienne-Joseph-Alexandre Macdonald, Duc de Tarente, soldier
- Nov 24 Cornelis RT Krayenhoff, fortress architect/cartographer, dies at 82
- Dec 11 Emperor Kokaku of Japan (b. 1771)