Events from the year 1808 in Denmark.

• Monarch – Christian VII (until 13 March),^[1] Frederick VI (starting 13 March)^[2]
• Prime minister – Christian Günther von Bernstorff

• 2 March – Action of 2, a naval battle between the British 18-gun Brig-sloop HMS Sappho, and the Danish 28-gun Danish brig of war Admiral Yawl
• 20 March – In the Battle of Zealand Point, Prins Christian, the last Danish ship-of-the-line, is defeated by a British squadron off Sjællands Odde. Peter Willemoes are among the Danish casualties.
• 9 June – The Battle of Saltholm

• 3 January – Jørgen Roed, painter (died 1888)
• 25 September – Erling Eckersberg, engraver (died 1889)
• 6 October – Frederick VII, king of Denmark (died 1863)^[3]

• 16 January – John Brown, merchant and ship-owner (born 1723)
• 7 February – Ove Høegh-Guldberg, statesman, historian, and de facto prime minister of Denmark (born 1731)
• 3 March – Johan Christian Fabricius, zoologist (born 1745)
• 24 March – Johan Friedrich Heinrich, colonial administrator (born 1730)
• 13 March – Christian VII, king of Denmark (born 1749)^[1]
• 22 March – Peter Willemoes, naval officer (born 1783)

• 3 April – Daniel Adzer, medallist (born 1732)
• 17 May – Carl Gottlob Rafn, physician (born 1769)