1778 in France

Incumbents

• Monarch - Louis XVI

  Events

• 6 February - Treaty of Alliance
• 27 July - Battle of Ushant

  Births

Full date missing

• Jacques Joseph Champollion-Figeac, archaeologist

  Deaths

• 9 January – Ladislas Ignace de Bercheny, Marshall of France
• 25 May – Jean-Baptiste Lemoyne, sculptor
• 30 May - Voltaire, writer, historian, and philosopher
• 20 June – Pierre Laclède, fur trader, founder of St. Louis
• 20 July – Élisabeth Duparc, soprano singer
• 3 August - François Alexandre Pierre de Garsault, botanist, zoologist and painter
• 5 August – Charles Clémencet, historian
• 28 September – Jean Girardet, painter