克里斯蒂安十世，或译基士扬十世（丹麦语：Christian 10.；冰岛语：Kristján 10.，1870年9月26日－1947年4月20日），全名克里斯蒂安·卡尔·弗雷德里克·阿尔伯特·亚历山大·威廉（Christian Carl Frederik Albert Alexander Vilhelm），丹麦国王，1912年－1947年在位。他也是冰岛王国惟一一名国王，1918年至1944年在位。尽管其在1920年的复活节危机中形象大为受损，但在其后第二次世界大战时期的英勇行为再次获得了国民的爱戴。

Christian X (Christian Carl Frederik Albert Alexander Vilhelm; 26 September 1870 – 20 April 1947) was the King of Denmark from 1912 to 1947 and the only king of Iceland (where the name was officially Kristján of Iceland), between 1918 and 1944.

He was a member of the House of Glücksburg and the first member of his family since king Frederick VII to have actually been born into the Danish royal family; both his father and his grandfather were born as princes of a German ducal family. Among his siblings was King Haakon VII of Norway.