|Primary outflows||Longerakåni river|
|Surface area||3.40 km2 (1.31 sq mi)|
|Shore length1||23.01 km (14.30 mi)|
|Surface elevation||596 m (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 dam on it which discharges into the Longerakåni river which flows into the Byglandsfjorden near Longerak. The 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.