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Location Trondheim and Malvik, Sør-Trøndelag
Coordinates 63°21′56″N 10°34′55″E / 63.3655°N 10.5820°E / 63.3655; 10.5820Coordinates: 63°21′56″N 10°34′55″E / 63.3655°N 10.5820°E / 63.3655; 10.5820
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]


  1. ^ Store norske leksikon. "Jonsvatnet" (in Norwegian). Retrieved 2011-03-09.