Dagebuell is a very small harbour and a village in Germany at the western terminus of the Norddeutsche Eisenbahngesellschaft Niebüll (NEG) railway from Niebüll. Ferries to the islands of Föhr and Amrum sail from the harbour.
Today's Dagebuell was created in 1978 as a merger of the municipalities of Fahretoft, Juliane-Marien-Koog and Waygaard. Dagebuell 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.