1611 in Denmark

• Monarch – Christian IV^[1]
• Steward of the Realm –

• April – The Kalmar War begins as Denmark-Norway declares war upon Sweden.
• 3 May – Danish forces lay siege to Kalmar. The Siege of Kalmar ends on August 3.
• 26 June – The Swedish Storming of Kristianopel.
• 3 July – Battle of Risbye.

Undated

• A Statue of Leda and the Swan is mounted on a tall column an installed on an artificial islet in the Port of Copenhagen.

• 2 February – Ulrik of Denmark, Prince of Denmark (died 1633 in Poland)
• 3 February – Christian Ulrik Gyldenløve, military officer (died 1640)

Undated

• 12 November – Joachim Gersdorff, statesman (died 1661)

• Caspar Bartholin the Elder, Anatomicae Institutiones Corporis Humani (1611)