The Ruwer is a river in Germany with a length of 46 km (28.6 mi), a tributary of the Mosel River. The valley of the Ruwer is a part of the wine-growing region Mosel-Saar-Ruwer near Trier in Rhineland-Palatinate. It is famous for its Riesling wines.
At the lower Ruwer valley are the villages Waldrach, Kasel, Mertesdorf, Eitelsbach and Ruwer.