| Jonsvatnet | |
|---|---|
| Location | Trondheim and Malvik, Sør-Trøndelag |
| Primary outflows | Vikelva |
| Basin countries | Norway |
| Max. length | 8 kilometres (5.0 mi) |
| Max. width | 4.5 kilometres (2.8 mi) |
| Surface area | 14.26 km2 (5.51 sq mi) |
| Shore length1 | 43.64 kilometres (27.12 mi) |
| Surface elevation | 148 metres (486 ft) |
| References | NVE |
| 1 Shore length is not a well-defined measure. | |
Jonsvatnet is a lake in Sør-Trøndelag county, Norway. Most of the lake is in the eastern part of the municipality of Trondheim, with a very small part of the shoreline belonging to Malvik municipality. The lake is the main source for drinking water for Trondheim.[1]