Nordfriesland, also known as North Frisia, is the northernmost district of Germany, part of the state of Schleswig-Holstein. It includes almost all of traditional North Frisia, as well as adjacent parts of the Schleswig Geest to the east and Stapelholm to the south, and is bounded by the districts of Schleswig-Flensburg and Dithmarschen, the North Sea and the Danish county of South Jutland. The district is called Kreis Nordfriesland in German, Kreis Noordfreesland in Low German, Kris Nordfraschlönj in Mooring North Frisian, Kreis Nuurdfresklun in Fering North Frisian and Nordfrislands amt in Danish.

North Frisian is a minority language of Germany, spoken by about 10,000 people in North Frisia. The language is part of the larger group of the West Germanic Frisian languages. The language comprises 10 dialects which are themselves divided into an insular and a mainland group.