1644 in Denmark

Events from the year 1644 in Denmark.

Incumbents

 * Monarch — Christian IV
 * Steward of the Realm — Corfitz Ulfeldt

Undated

 * the Domus Anatomica anatomical theatre is completed.
 * the Torstenson War breaks out between Denmark–Norway and Sweden. It was resolved by the Second Treaty of Brömsebro in 1645.

Torstenson War

 * 9 January – the Battle of Kolding begins the Torstenson War.
 * 16 May – the Action of 16 May 1644.
 * 1 July – the Battle of Colberger Heide.
 * 13 October – the Battle of Frehmarn.
 * 22 December – the Battle of Bysjön.

Births

 * 18 March – Oliger Paulli, merchant and publisher (died 1714)
 * 26 March – Berte Skeel, noblewoman (died 1720)
 * 21 April – Conrad von Reventlow, Grand Chancellor of Denmark (died 1708)
 * 25 September – Ole Rømer, astronomer (died 1710)

Deaths

 * 20 February – Jens Bang, merchant (born c. 1575)
 * 13 October – Pros Mund, admiral (born c. 1589)
 * 18 December – Leonhard Blasius, architect (born in the Netherlands)

Date unknown

 * October – Corfits Ulfeldt, naval officer (born c. 1600)