1678 in Denmark

Events from the year 1678 in Denmark.

Incumbents

 * Monarch – Christian V
 * Grand Chancellor – Frederik Ahlefeldt

Scanian War

 * 18 January – Battle of Warksow, the Swedish navy defeats the forces of Denmark-Norway and Brandenburg-Prussia.
 * 22–24 September – Invasion of Rügen, the allied forces of Denmark-Norway and Brandenburg-Prussia occupy Rügen.

Births

 * 24 June – Ulrik Christian Gyldenløve, Count of Samsø, admiral and illegitimate son of Christian V (died 1719)

Deaths

 * 5 October – Hedevig Ulfeldt, daughter of king Christian IV (born 1626)