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:
On January 1, 2006 Geraardsbergen had a total population of 31,380. The total area is 79.71 km² which gives a population density of 394 inhabitants per km².
The current mayor of Geraardsbergen is , from the Open VLD (liberal) party.