Denmark: Heads of State: 1863-2023 Royal House: Slesvig-Holsten-Sønderborg-Glücksborg Af Guds Nåde Konge til Danmark, de Venders og Goters, Hertug til Slesvig, Holsten, Stormarn, Ditmarsken, Lauenborg og Oldenborg (1 Dec 1918 - 17 Jun 1944 Af Guds Nåde Konge til Danmark og Island, de Venders og Goters, Hertug til Slesvig, Holsten, Stormarn, Ditmarsken, Lauenborg og Oldenborg) 15 Nov 1863 - 29 Jan 1906 Christian 9. (Christian Frederik) [1] 29 Jan 1906 - 14 May 1912 Frederik 8. (Christian Frederik Vilhelm Carl) 14 May 1912 - 20 Apr 1947 Christian 10. (Christian Carl Frederik Albert Alexander Vilhelm) [2] 20 Apr 1947 - 14 Jan 1972 Frederik 9. (Christian Frederik Franz Michael Carl Valdemar Georg) Af Guds Nåde Danmarks Dronning (style proclaimed 15 Jan 1972) 14 Jan 1972 - Margrethe 2. (Margrethe Alexandrine Þórhildur Ingrid) [3] [1] Also in Schleswig (Slesvig), Holstein, and Lauenburg. [2] Also in Iceland. [3] Ordinal 2. chosen with reference to Dronning Margrethe Valdemarsdatter, who ruled Denmark, Sweden, and Norway, but not as queen regnant. Last updated on: 29 Nov 2023; URL: www.archontology.org/nations/denmark/00_1863_td_s.php