Grevenknapp (Luxembourgish: Gréiweknapp) is a village in the commune of Boevange-sur-Attert, in western Luxembourg. As of 2005[update], the village had a population of 179. The altitude of Grevenknapp is about 317 meters.
Coordinates: 49°45′N 6°02′E / 49.750°N 6.033°E