1890 disestablishments in the British Empire

Heligoland (; , ; Heligolandic Frisian: , , Mooring Frisian: , ) is a small archipelago in the North Sea, administratively part of the German state of Schleswig-Holstein. The islands are located in the Heligoland Bight (part of the German Bight) in the southeastern corner of the North Sea and are the only German islands not in the vicinity of the mainland: they lie approximately by sea from Cuxhaven at the mouth of the River Elbe.