The Rauschenburg, also called Rauschenburg Castle (German: Burg Rauschenberg), is the medieval ruin of a hill castle, located at around 250 metres above sea level, above the Ehrbach stream in the parish of Mermuth in the county of Rhein-Hunsrück-Kreis in the German state of Rhineland-Palatinate.

In 1332 the Archbishop of Trier, Baldwin of Luxembourg, built the Rauschenburg during the Eltz Feud.

Later tenants of the castle, which was enfeoffed by the Archbishopric of Trier, was divided among several families, including the Schönecks, von Eichs, Waldbott of Bassenheim and Boos of Waldeck).

On the uphill side was a neck ditch cuts across the saddle and would have formed the first obstacle to any attack.

In the centre of the western part of the enceinte are the remains of a tower, perhaps the old bergfried.