King Frederick or King Frederik may refer to:
- Frederick I of Denmark
- Frederick II of Denmark
- Frederick III of Denmark
- Frederick IV of Denmark
- Frederick V of Denmark
- Frederick VI of Denmark
- Frederick VII of Denmark
- Frederik VIII of Denmark
- Frederik IX of Denmark
- Frederik X of Denmark
- Frederick I of Sweden
- Frederick I of Prussia, previously Frederick III, Elector of Brandenburg
- Frederick II of Prussia, Frederick the Great
- Frederick III, German Emperor, also King Frederick III of Prussia
- Frederick I of Württemberg (1754–1816)
- Frederick of Naples
- Frederick I, Holy Roman Emperor, also King of Italy
- Frederick II, Holy Roman Emperor, also King Frederick I of Sicily
- Frederick III, Holy Roman Emperor, also King of Italy
- Frederick III of Sicily
- Frederick the Simple
- Frederick the Fair
- Frederick V of the Palatinate
In addition, a number of kings of Prussia were named Frederick William:
- Frederick William I of Prussia (1688–1740)
- Frederick William II of Prussia (1744–1797)
- Frederick William III of Prussia (1770–1840)
- Frederick William IV of Prussia (1795–1861)
In addition, a number of kings of Saxony were named Frederick Augustus:
- Frederick Augustus I of Saxony (1750–1827)
- Frederick Augustus II of Saxony (1797–1854)
- Frederick Augustus III of Saxony (1865–1932)
This disambiguation page lists articles associated with the title King Frederick.If an internal link led you here, you may wish to change the link to point directly to the intended article. Categories: