| Longerakvatnet Longeraksvatnet | |
| Pushpin Map: | Agder#Norway |
| Pushpin Label: | Longerakvatnet |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location of the lake |
| Coordinates: | 58.7449°N 7.9005°W |
| Location: | Bygland, Agder |
| Type: | Artificial lake |
| Outflow: | Longeraksåni river |
| Basin Countries: | Norway |
| Area: | 3.4km2 |
| Reference: | NVE |
Longerakvatnet or Longeraksvatnet is a lake in the municipality of Bygland in 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 3.4km2 lake is located about southeast of the village of Lauvdal and about northeast of the village of Byglandsfjord.[1]