Vansjø

infobox_lake
lake_name = Vansjø
location = Moss, Råde, Rygge, Våler (Østfold)
basin_countries= Norway
inflow =
outflow =
area = 36.94 km²
elevation = 25 m
residence_time =
shore = 175.41 km
depth =
max-depth = 41 m
volume = 263.9km³
coords = coord|59|24|47|N|10|42|43|E|type:waterbody_region:NO_scale:200000|display=inline,title
cities =
islands =
reference = NVE

Vansjø is a lake in the municipalities of Moss, Råde, Rygge, Våler in Østfold county, Norway. It has an area of 36.9 km² and an estimated coastline of about 250 km. Etymologically the name likely derives from "Varna sjor", the ancient name of the municipality of Rygge

ee also

*List of lakes in Norway