|Location||Steigen and Hamarøy, Nordland|
|Max. length||4 kilometres (2.5 mi)|
|Max. width||1.3 kilometres (0.81 mi)|
|Surface area||4.83 km2 (1.86 sq mi)|
|Shore length1||13.89 kilometres (8.63 mi)|
|Surface elevation||258 metres (846 ft)|
|1 Shore length is not a well-defined measure.|
Forsanvatnet or Forsvatnet is a lake that lies on the border of the municipalities of Steigen and Hamarøy in Nordland county, Norway. The 4.83-square-kilometre (1.86 sq mi) lake lies just south of the Steigen Tunnel in the northeast part of Steigen.