|Location||Evje og Hornnes and
|Surface area||4.62 km2 (1.78 sq mi)|
|Shore length1||40.73 km (25.31 mi)|
|Surface elevation||565 m (1,854 ft)|
|1 Shore length is not a well-defined measure.|
Gyvatn is a lake which straddles the borders of the three Norwegian municipalities of Bygland and Evje og Hornnes (in Aust-Agder county) and Åseral (in Vest-Agder county). It's located about 8 kilometres (5.0 mi) northwest of the village of Byglandsfjord and the lake Byglandsfjorden.
- "Gyvatn" (in Norwegian). yr.no. Retrieved 2010-04-20.