Helfenstein can refer to:
House of Helfenstein, a German noble family Helfenstein Castle, a ruined castle near Geislingen an der Steige, Baden-Württemberg, Germany; the former seat of the House of Helfenstein Helfenstein (Habichtswald), a hill in Hesse, Germany Château de Helfenstein, a ruined castle near Éguelshardt, Lorraine, France 8067 Helfenstein, a comet Sven Helfenstein (born 1982), Swiss ice hockey player