Norderoog (Halligen Frisian: Noorderuug, Danish: Nørreog) is one of the ten German halligen islands of the North Frisian Islands in the Wadden Sea, which is part of the North Sea off the coast of Germany. A part of Hooge municipality, the island belongs to the Nordfriesland district. It is only temporarily inhabited by a bird warden from March to October. The refuge hut at the northeastern end is called Jens Wand Hütte, which is built on stilts to protect it from flooding. A former terp had been washed away. It has been the site of several ecological studies.