The Molenberg is a hill in the municipality of Zwalm, in the Belgian province of East Flanders, with its top at 56 m. It is one of the many hills in the Zwalm region, just north of the Flemish Ardennes. The road of the Molenberg has a roughly-paved cobbled surface, which is classified and protected as a landscape monument. At the foot of the hill there is a 13th-century water mill, the Moldergemmolen, from which the hill takes its name.