King Leopold may refer to:

Leopold I of Belgium (1790–1865), first king of the Belgians

Leopold II of Belgium (1835–1909), second king of the Belgians and founder and owner of the Congo Free State

Leopold III of Belgium (1901–1983), fourth king of the Belgians

Leopold I, Holy Roman Emperor (1640–1705), also king of Hungary, Bohemia and Croatia

Leopold II, Holy Roman Emperor (1747–1792), also king of Hungary, Bohemia and Croatia