| Tornbergssjön | |
| Pushpin Map: | Sweden Stockholm |
| Pushpin Map Alt: | Location of lake |
| Coords: | 59.1344°N 18.0228°W |
| Basin Countries: | Sweden |
| Area: | ~11000m2 |
| Elevation: | 90m (300feet) |
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.