Editing 1803 (section)

=== July–December ===
[[File:Herder by Kügelgen.jpg|thumb|110px|[[Johann Gottfried Herder]]]]
* [[August 24]] – [[James Napper Tandy]], Irish republican
* [[September 5]] – [[Pierre Choderlos de Laclos]], French general, author (b. 1741)
* [[September 13]] – [[John Barry (naval officer)|John Barry]], officer in the [[Continental Navy]] during the [[American Revolutionary]] War, later in the [[United States Navy]] (b. 1745)
* [[September 15]]
** [[Gian Francesco Albani]], Italian Catholic cardinal (b. 1719)
** [[François Devienne]], French composer (b. 1759)
* [[September 16]] – [[Nicolas Baudin]], French explorer (b. 1754)
* [[September 17]] – [[Franz Xaver Süssmayr]], Austrian composer (b. 1766)
* [[September 23]] – [[Joseph Ritson]], English antiquary (b. 1752)
* [[September 27]] – [[Frances Brett Hodgkinson]], English-born American actress (b. 1771)
* [[October 2]] – [[Samuel Adams]], American revolutionary leader (b. 1722)
* [[October 8]] – [[Vittorio Alfieri]], Italian dramatist, poet (b. 1749)
* [[October 14]] – [[Louis Claude de Saint-Martin]], French philosopher (b. 1743)
* [[October 26]] – [[Granville Leveson-Gower, 1st Marquess of Stafford]], English politician (b. 1721)
* [[October 31]] – [[Pandara Vanniyan]], last [[Vannimai|King of Vanni]] (defeated by [[Lt. Friedrich Wilhelm von Driberg|Lt. von Driberg]])
* [[November 11]] – [[Raphael Cohen]], German rabbi (b. 1722)
* [[November 17]] – [[John Willett Payne]], British Royal Navy admiral (b. 1752)
* [[November 18]] – [[Ditlevine Feddersen]], Norwegian culture figure (b. 1727)
* [[November 25]] – [[Joseph Wilton]], English sculptor (b. 1722)
* [[December 7]] – [[Gerrit Paape]], Dutch politician, writer (b. 1752)
* [[December 15]] – [[Dru Drury]], English entomologist (b. 1725)
* [[December 18]] – [[Johann Gottfried Herder]], German philosopher, writer (b. 1744)
* [[December 26]] – [[Gian Carlo Passeroni]], Italian writer (b. 1713)
* [[December 30]] – [[Francis Lewis]], American signer of the Declaration of Independence (b. 1713)