Foldsjøen

Infobox lake
lake_name = Foldsjøen
image_lake =
caption_lake =
image_bathymetry =
caption_bathymetry =
location = Surnadal and Rindal, Møre og Romsdal
coords = coord|62|57|57|N|9|6|51|E|type:waterbody_region:NO|display=inline,title
type =
inflow =
outflow =
catchment =
basin_countries = Norway
length =
width =
area = 6.79 km²
depth =
max-depth =
volume =
residence_time =
shore = 18.19 km
elevation = 420 m
islands =
cities =

Foldsjøen is a lake in the municipalities Surnadal og Rindal in Møre og Romsdal. The lake is dammed and the water is used in Trollheim power station.

Slightly more elevated and directly to the south is the dammed lake Gråsjøen.