Editing 1830 (section)

=== July–December ===
[[File:William Hazlitt self-portrait (1802).jpg|thumb|right|110px|[[William Hazlitt]]]]
* [[August 6]] – [[David Walker (abolitionist)|David Walker]], African-American abolitionist (b. [[1796]])
* [[August 24]] – [[Louis Pierre Vieillot]], French ornithologist (b. [[1748]])
* [[September 18]] – [[William Hazlitt]], English essayist (b. [[1778]])
* [[September 23]]
** [[Alice Flowerdew]], British teacher, poet, and hymnwriter, (b. [[1759]])
** [[Elizabeth Monroe]], [[First Lady of the United States]] (b. [[1768]])
* [[October 4]] – [[Ludwig Yorck von Wartenburg]], Prussian military leader (b. [[1759]])
* [[October 5]] – [[Dinicu Golescu]], Romanian writer (b. [[1777]])
* [[October 11]] – [[José de La Mar]], military leader, President of Peru (b. 1776)<ref>{{Cite book|last=Basadre |first=Jorge |year=2005 |orig-year=First published 1939 |title=Historia de la República del Perú (1822 - 1933) |volume=1 |page=296 |edition=9th |language=es |trans-title=History of the Republic of Peru (1822 - 1933) |location=Lima |publisher=El Comercio |isbn=978-612-306-354-2}}
</ref>
* [[October 31]] – [[Petar I Petrović-Njegoš]], ruler of Montenegro (b. [[1747]])
* [[November 8]] – [[Francis I of the Two Sicilies]] (b. [[1777]])
* [[November 18]] – [[Adam Weishaupt]], German philosopher (b. [[1748]])
* [[November 30]] – [[Pope Pius VIII]], Italian pontiff (b. [[1761]])
* [[December 6]] – [[Morton Eden, 1st Baron Henley]], British diplomat (b. [[1752]])
* [[December 8]] – [[Benjamin Constant]], Swiss writer (b. [[1767]])
* [[December 17]] – [[Simón Bolívar]], Venezuelan revolutionary leader, statesman (b. [[1783]])