Until 1864, North Frisia was a part of the Danish Duchy of Schleswig (South Jutland). It is now part of the German state of Schleswig-Holstein with all of North Frisia except for Heligoland contained within the district of Nordfriesland. The district extends beyond the traditional area of North Frisia to the south and east.
North Frisia is called Nordfriesland in German and Noordfreesland in Low German. In the various North Frisian dialects, it is called Nordfraschlönj in Mooring, Noordfreeskluin in Wiedingharde Frisian, Nuurdfriislön’ in Söl'ring, Nuurdfresklun or Nuardfresklun in Fering, and Nöördfreesklöön in Halligen Frisian. The region is called Nordfrisland in Danish.