Dagebüll is a municipality located at the west coast of Schleswig-Holstein in the Nordfriesland district, Germany. Today's Dagebüll was created in 1978 as a merger of the municipalities of Fahretoft, Juliane-Marien-Koog and Waygaard. Dagebüll used to be a Hallig, the oldest houses were built on artificial dwelling hills which in parts can still be seen today. In 1704 the area was secured by sea dikes.

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.