This is a list of Danish monarchs, that is, the Kings and Queens regnant of Denmark. This includes:

• The Kingdom of Denmark (up to 1397)
  • Personal union of Denmark and Norway (1380–1397)
• The Kalmar Union (1397–1536)
  • Union of Denmark, Norway and Sweden (1397–1523)
  • Union of Denmark and Norway (1523–1536)
• The Kingdom of Denmark-Norway (1536–1814)
• The Kingdom of Denmark (1814–present)
  • Iceland (since the union between Denmark and Norway in 1380; independent in a personal union with Denmark 1918–1944; a sovereign republic since 1944)
  • Greenland (since the union between Denmark and Norway in 1380; effective Danish control began in 1721; integrated into the Danish realm in 1953; internal home rule introduced 1979; self-determination assumed in 2009)
  • Faroe Islands (since the union between Denmark and Norway in 1380; County of Denmark 1816–1948; internal home rule introduced 1948)

The Monarchy of Denmark, colloquially known as the Danish Monarchy, is a constitutional institution and a historic office of the Kingdom of Denmark. The Kingdom includes not only Denmark, but the autonomous regions of Greenland and the Faroe Islands. The monarchy is currently represented by Queen Margrethe II, who ascended the throne on the death of her father, King Frederik IX, on 14 January 1972. Danish regnal names have traditionally alternated between "Frederick" (Frederik) and "Christian"; Margrethe has taken the place of a Christian, and accordingly her heir apparent is Crown Prince Frederik.