叙尔特岛（德语：Sylt，德语发音：[ˈzʏlt]；丹麦语：Sild；北弗里西亚语Söl'ring方言: Söl' ）位于德国北部，是北弗里西亚群岛德国境内最大，位置最北的岛屿，也是德国的第四大岛。面积99平方公里，通过长11公里的兴登堡铁路堤道（Hindenburgdamm）与大陆同铁路。长超过35公里，最窄处仅1公里宽。东岸中部有一鸟嘴状半岛伸向大陆。壮丽的沙滩在平坦的西海岸延伸，冰川形成的冰碛石红崖高30米。岛上分布有史前巨石墓穴等遗迹。有饲养乳牛和羊的小农场及分散的村庄。经济以旅游业为主，主要旅游胜地有利斯特，韦斯特兰，文尼斯塔特-布拉德鲁伯等。叙尔特岛为石勒苏益格－荷尔斯泰因瓦登海国家公园的一部分。

Sylt (German pronunciation:[ˈzʏlt]; Danish:Sild; Söl'ring North Frisian: Söl) is an island in northern Germany, part of Nordfriesland district, Schleswig-Holstein, and well known for the distinctive shape of its shoreline. It belongs to the North Frisian Islands and is the largest island in North Frisia. The northernmost island of Germany, it is known for its tourist resorts, notably Westerland, Kampen and Wenningstedt-Braderup, as well as for its 40-kilometre-long (25-mile) sandy beach. It is frequently covered by the media in connection with its exposed situation in the North Sea and its ongoing loss of land during storm tides. Since 1927, Sylt has been connected to the mainland by the Hindenburgdamm causeway. In latter years, it has been a resort for the German jet set and tourists in search of occasional celebrity sighting.