Year (''' MDCCLXV ''') was a Common Year Starting On Tuesday (link will display the full calendar) of the Gregorian Calendar (or a Common Year Starting On Saturday of the 11-day slower Julian Calendar ).
- January 11 - Antoine Alexandre Barbier , French librarian (died 1825 )
- February 1 - Charles Hatchett , English chemist (died 1847 )
- March 7 - Nicéphore Niépce , French inventor (died 1833 )
- March 27 - Franz Xaver Von Baader , German philosopher and theologian (died 1841 )
- April 1 - Luigi Schiavonetti , Italian engraver (died 1810 )
- April 6 - Duke Charles Felix Of Savoy (died 1831 )
- April 26 - Emma, Lady Hamilton , English mistress of Horatio Nelson (died 1815 )
- June 15 - Henry Thomas Colebrooke , English orientalist (died 1831 )
- July 11 - Abigail Amelia , Firstborn daughter of Abigail And John Adams (d.1813)
- July 26 - Jean-Baptiste Drouet, Count D'Erlon , French marshal (died 1844 )
- August 21 - King William IV Of The United Kingdom (died 1837 )
- September 18 - Pope Gregory XVI (died 1837 )
- October 8 - Harman Blennerhassett , Irish-American lawyer (died 1831 )
- October 17 - Henri Jacques Guillaume Clarke , duc de Feltre, French marshal and politician (died 1818 )
- October 24 - James Mackintosh , Scottish publicist (died 1832 )
- November 14 - Robert Fulton , American inventor (died 1815 )
- November 17 - Étienne-Jacques-Joseph-Alexandre MacDonald , French marshal (died 1840 )
- November 20 - Sir Thomas Fremantle , British captain and politician (died 1819)
- December 8 - Eli Whitney , American inventor (died 1825 )
- ''date unknown''
- --- Pyotr Bagration , Russian general (died 1812 )
- --- Mary Bryant , one of the first successful escapees from the fledging Australian penal colony.
- --- James Smithson , British mineralogist and chemist who left a bequest in his will to the United States of America which was used to initially fund the Smithsonian Institution (died 1829 ).
: ''See also .''
- March 3 - William Stukeley , English archaeologist (born 1687 )
- March 27 - Arthur Dobbs , Irish politician and governor of the Royal Colony of North Carolina (born 1689 )
- April 5 - Edward Young , English poet (born 1683 )
- April 15 - Mikhail Lomonosov , Russian author and scientist (born 1711 )
- April 20 - Abigail Williams , American accuser in the Salem witch trials (born 1674 )
- May 17 - Alexis Claude Clairault , French mathematician (born 1713 )
- July 15 - Charles-André Van Loo , French painter (born 1705 )
- August 18 - Francis I, Holy Roman Emperor (born 1708 )
- September 2 - Henry Bouquet , Swiss-born British army officer (born 1719 )
- October 10 - Lionel Sackville, 1st Duke Of Dorset , Lord Lieutenant of Ireland (born 1688 )
- October 21 - Giovanni Paolo Pannini , Italian painter and architect (born 1691 )
- October 31 - Prince William Augustus, Duke Of Cumberland , English military leader (born 1721 )
- November 30 - George Glas , Scottish merchant and adventurer (born 1725 )
- December 3 - Lord John Philip Sackville , English cricketer (born 1713 )
- December 16 - Peter Frederick Haldimand , Swiss-born military officer and surveyor
- December 25 - Vaclav Prokop Divis , Czech scientist (born 1698 )
: ''See also .''
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