1686 in Denmark

Events from the year 1686 in Denmark.

Incumbents

 * Monarch – Christian V
 * Grand Chancellor – Frederik Ahlefeldt, until his death on 7 July.

Undated

 * Store Bededag is introduced by the Church of Denmark, combining several Catholic holy days into a single holiday.
 * Gabriel Milan is removed as Governor of the Danish West Indies and placed under arrest for treason.

Births

 * 5 April – Poul Vendelbo Løvenørn, Secretary of War and Minister of the Navy (died 1740)
 * 12 August – Bendix Grodtschilling the Youngest, painter and conchologist (died 1737)

Deaths

 * 29 May – Ove Juul, nobleman and vice Governor-general of Norway (born 1615)
 * 7 July – Frederik Ahlefeldt, statesman and Grand Chancellor (born 1623)
 * 25 November – Nicolas Steno, 17th-century scientist and bishop (born 1638)