Vadfoss is a village in Kragerø municipality of Norway, located on the Kammerfoss River (alternate name: Kragerø River) midway between Helle to the east and Sannidal to the west. It is also close to the city of Kragerø, located roughly 5 km (3.1 mi) to the northwest. Since the village is so small and close to Helle, Statistics Norway considers them a single village Vadfoss/Helle with a combined population of 1,556.