The Struvenburg was a medieval castle immediately east of Benzingerode, a village in the borough of Wernigerode in the district of Harz in the German state of Saxony-Anhalt.

The site of the castle is on an isolated east-west limestone ridge, the Struvenberg, that descends towards the west into the basin where the village is situated, and is continued eastwards by the Ziegenberg.

Another outwork with a length of about 70 metres lies on the extreme western slope of the ridge.

Because other finds are clearly of Saxon origin, it is possible that the 9th-century castle was built on the site of an even older hillfort.

From its strategic location – the castle lay close to an important crossroads – it may have had a military purpose in connexion with the overthrow of the local Saxon population by the Franks.