Events from the year 1717 in Denmark.

• Monarch – Frederick IV^[1]
• Grand Chancellor – Christian Christophersen Sehested

• 13–14 May – Battle of Gothenburg, battle of the Great Northern War.
• 25 December – The Christmas Flood of 1717 affects the west coast of Sønderjylland.

• Planters move from Saint Thomas to Saint John. leading to Denmark claiming the island in 1718.

• 27 October – Hans Hagerup Gyldenpalm, jurist and government official (died 1781)

• 1 July – Princess Anna Sophie of Denmark (born 1647)
• 21 December – Gustav Wilhelm Wedel Jarlsberg, general (born 1641)