The North Frisian Islands are a group of islands in the Wadden Sea, a part of the North Sea, off the western coast of Schleswig-Holstein, Germany. The German islands are in the traditional region of North Frisia and are part of the Schleswig-Holstein Wadden Sea National Park and the Kreis (district) of Nordfriesland. Occasionally Heligoland is also included in this group.

Sometimes the North Frisian Islands include also the Danish Wadden Sea Islands on the western coast of Jutland, Denmark. They belong to Sønderjyllands Amt and Ribe Amt. The ethnic group of Frisians lives only on the German-ruled islands.