Geraardsbergen is a city and municipality located in the Denderstreek and in the Flemish Ardennes, the hilly southern part of the Belgian province of East Flanders. The municipality comprises the city of Geraardsbergen proper and the following towns: Goeferdinge, Grimminge, Idegem, Moerbeke, Nederboelare, Nieuwenhove, Onkerzele, Ophasselt, Overboelare, Schendelbeke, Smeerebbe-Vloerzegem, Viane, Waarbeke, Zandbergen and Zarlardinge. In 2021, Geraardsbergen had a total population of 33,970.