Askjelldalsvatnet is a lake in the municipality of Vaksdal in Vestland county, Norway. The small lake lies at an elevation of 805 metres (2,641 ft) in the Vikafjell mountains between the valleys of Modalen and Eksingedalen. The 2.84-square-kilometre (1.10 sq mi) lake has a dam at the southern end of the lake. The Askjelldalsvatnet dam is used to regulate the water level so that the water can be used for water power at a nearby power plant. The lake Skjerjavatnet lies about 1 kilometre (0.62 mi) to the west.