Grevenknapp (Luxembourgish: Gréiweknapp) is a village in the commune of Helperknapp, in western Luxembourg. As of September 2026[update], the village had a population of 325. The altitude of Grevenknapp is about 317 meters.
49°45′N 6°02′E / 49.750°N 6.033°E / 49.750; 6.033
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