Drachenfels (German: dragon's rock) is the name of
Hills: Drachenfels (Siebengebirge), a hill on the Rhine between Königswinter and Bad Honnef, North Rhine-Westphalia Drachenfels (Central Palatinate Forest), hill and Roman fortification in the north of the Palatinate Forest, Rhineland-Palatinate
Castle ruins: Drachenfels Castle (Siebengebirge), on the Rhine between Königswinter and Bad Honnef, North Rhine-Westphalia Drachenfels Castle (Wasgau), near Busenberg im Wasgau in the south of the Palatinate Forest, Rhineland-Palatinate
People: Gottfried von Drachenfels (Siebengebirge) (died 1273), Viscount of Castle Drachenfels on the Rhine Rudolf von Drachenfels (1582–1656), German civil servant and occasional poet
Fiction: Drachenfels (1989), a vampire novel by Kim Newman, originally published under his pen name Jack Yeovil