The Frisian Islands, also known as the Wadden Islands or Wadden Sea Islands, form an archipelago at the eastern edge of the North Sea in northwestern Europe, stretching from the north-west of the Netherlands through Germany to the west of Denmark. The islands shield the mudflat region of the Wadden Sea from the North Sea.
The Frisian Islands, along with the mainland coast in the German Bight, form the region of Frisia, traditional homeland of the Frisian people. Generally, the term Frisian Islands is used for the islands where Frisian is spoken and the population is ethnically Frisian. In contrast, the term Wadden Islands is used for the entire archipelago, including the Danish-speaking Danish Wadden Sea Islands slightly further to the north on the western coast of Jutland.