The Königshafen is the northernmost bight of the North Frisian island of Sylt in the German state of Schleswig-Holstein and thus also the northernmost bay in Germany. The bay gets its name from its use as a natural harbour and its legal status as part of the Royal Danish enclave of Listland. The harbour was used until at least the 18th century and was later abandoned as it silted up.
The bay of Königshafen lies north of the Sylt coastal resort of List and southeast of the promontory of Ellenbogen, the northernmost point of Germany, on which stand the lighthouses of List East and List West, the two northernmost buildings in Germany. The bay has an area of roughly 4.2 km² and opens towards the east onto the Wadden Sea; it is only separated from the open North Sea to the west by a spit which is just 300 metres wide. In the Königshafen lie the small uninhabited island of Uthörn with its bird reserve, and the Lister Haken.