|Primary outflows||Longeraksåni river|
|Max. length||4 kilometres (2.5 mi)|
|Max. width||2.2 kilometres (1.4 mi)|
|Surface area||3.4 km2 (1.3 sq mi)|
|Shore length1||23 kilometres (14 mi)|
|Surface elevation||596 metres (1,955 ft)|
|1 Shore length is not a well-defined measure.|
Longerakvatnet or Longeraksvatnet is a lake in the municipality of Bygland in Aust-Agder county, Norway. It has a small dam on the southwest side to regulate the water level for hydro-electric power generation at a plant located down the hill. The lake discharges into the Longeraksåni river which flows into the Byglandsfjorden near the village of Longerak. The 3.4-square-kilometre (1.3 sq mi) lake is located about 6 kilometres (3.7 mi) southeast of the village of Lauvdal and about 10 kilometres (6.2 mi) northeast of the village of Byglandsfjord.
- "Longeraksvatnet" (in Norwegian). yr.no. Retrieved 2010-04-20.