|Max. length||2.7 kilometres (1.7 mi)|
|Max. width||3 kilometres (1.9 mi)|
|Surface area||2.46 km2 (0.95 sq mi)|
|Shore length1||19.36 kilometres (12.03 mi)|
|Surface elevation||618 metres (2,028 ft)|
|1 Shore length is not a well-defined measure.|
Nasvatn is a lake in the municipality of Åmli in Aust-Agder county, Norway. It is located about 3.5 kilometres (2.2 mi) north of the village of Hillestad in the mountains above the Tovdal river valley. The lake has a small dam on the southwestern end, and the water leaving the lake goes down a large waterfall and eventually drains in the river Tovdalselva.
- "Nasvatn" (in Norwegian). yr.no. Retrieved 2010-04-15.