Editing 1799 (section)

===January–June===
[[File:清 郎世宁绘《清高宗乾隆帝朝服像》.jpg|thumb|110px|[[Qianlong Emperor]]]]
[[File:Tipu Sultan BL.jpg|thumb|134x134px|[[Tipu Sultan]]]]
* [[January 9]] – [[Maria Gaetana Agnesi]], Italian mathematician (b. 1718)
* [[January 18]] – [[Heinrich Johann Nepomuk von Crantz]], Luxembourgish botanist (b. 1722)
* [[January 22]] – [[Horace-Bénédict de Saussure]], Swiss aristocrat, alpinist (b. 1740)
* [[January 26]] – [[Gabriel Christie (British Army officer)]], British Army general (b. 1722)
* [[February 6]] – [[Étienne-Louis Boullée]], French architect (b. 1728)
* [[February 7]] – [[Qianlong Emperor]] of China (b. 1711)
* [[February 9]] – [[Johann Baptist Babel]], Swiss sculptor (b. 1716)
* [[February 12]]
** [[František Xaver Dušek]], Czech composer (b. 1731)
** [[Lazzaro Spallanzani]], Italian biologist, physiologist (b. 1729)
* [[February 16]] – [[Charles Theodore, Elector of Bavaria]] (b. 1724)
* [[February 19]] – [[Jean-Charles de Borda]], French mathematician, physicist, political scientist, and sailor (b. 1733)
* [[February 22]] – [[Heshen]], Manchu official under Qianlong (b. 1750)
* [[February 24]] – [[Georg Christoph Lichtenberg]], German scientist, satirist, and Anglophile (b. 1742)<ref>{{cite book | last = Lichtenberg | first = Georg | title = Georg Christoph Lichtenberg : philosophical writings, selected from the Waste books | publisher = State University of New York Press | location = Albany | year = 2012 | isbn = 9781438441986 | page=2}}</ref>
* [[March 13]] – [[Richard Hotham]], English property developer and politician (b. 1722)
* [[March 17]] – [[Sir Charles Thompson, 1st Baronet]], British admiral, politician (b. c. 1740)
* [[March 18]]
** [[Charles Guillaume Le Normant d'Étiolles]], French official, husband of Madame de Pompadour (b. 1717)
** [[Adam Friedrich Oeser]], German etcher (b. 1717)
* [[March 28]] – [[Etta Palm d'Aelders]], Dutch-French feminist (b. 1743)
* [[March 29]] – [[Helena Dorothea von Schönberg]], German industrialist (b. 1729)
* [[April 3]] – [[Pierre Charles Le Monnier]], French astronomer (b. 1715)
* [[April 6]] – [[Alexander Bezborodko]], Grand Chancellor of Russia, architect of [[Catherine the Great]]'s foreign policy (b. 1747)
* [[April 28]] – [[Matthew Griswold (governor)]], 17th Governor of Connecticut (1784–1786) (b. 1714)
* [[May 2]] – [[Juan Vicente de Güemes, 2nd Count of Revillagigedo|Guemes Padilla Horcasitas]], the Viceroy of [[New Spain]] (b. 1740)
* [[May 4]] – [[Tipu Sultan]], 48, Indian warrior and ruler of the [[Kingdom of Mysore]] in the late 18th century (b. 1750)<ref>{{Cite web |title=Tipu Sultan killed at Seringapatam {{!}} History Today |url=https://www.historytoday.com/archive/months-past/tipu-sultan-killed-seringapatam |access-date=2023-09-03 |website=www.historytoday.com}}</ref>
* [[May 18]] – [[Pierre Beaumarchais]], French writer (b. 1732)<ref>{{cite book | last = Sadie | first = Stanley | title = Mozart and his operas | publisher = Macmillan Reference Ltd. St. Martin's Press | location = London New York | year = 2000 | isbn = 9780333790199 | page=113}}</ref>
* [[May 22]] – [[Toypurina]], Medicine woman of the Tongva nation and rebel leader (b. 1750)
* [[May 26]] – [[James Burnett, Lord Monboddo]], Scottish jurist (b. 1714)
* [[May 30]] – [[Robert McQueen, Lord Braxfield]], Scottish advocate and judge (b. 1722)
* [[June 6]] – [[Patrick Henry]], American revolutionary politician, Governor of Virginia (b. 1736)<ref>{{Cite web |last=Glass |first=Andrew |date=2018-06-06 |title=Patrick Henry dies in Virginia at age 63, June 6, 1799 |url=https://www.politico.com/story/2018/06/06/patrick-henry-dies-in-virginia-at-age-63-june-6-1799-619111 |access-date=2023-09-03 |website=POLITICO |language=en}}</ref>
* [[June 7]] – [[Victoire of France]], French princess (b.1733)
* [[June 10]] – [[Chevalier de Saint-Georges]], Guadeloupe-born French musician (b. 1745)
* [[June 24]] – [[Dunbar Douglas, 4th Earl of Selkirk]], Scottish peer (b. 1722)
* [[June 30]] – [[Francesco Caracciolo (naval officer)|Francesco Caracciolo]], Neapolitan admiral, revolutionist (b. 1752)