Tornbergssjön is a lake of Södermanland, Sweden. The lake inherits its name from the nearby peak Tornberget, which at 111 meters above sea level is the highest point in Stockholm County.

Tornbergssjön
View of lake
Location of lake
Location of lake
Tornbergssjön
Coordinates59°08′04″N 18°01′22″E / 59.13444°N 18.02278°E / 59.13444; 18.02278
Basin countriesSweden
Surface area~11,000 m2 (120,000 sq ft)
Surface elevation90 m (300 ft)

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