通湖是挪威的湖泊，由北特伦德拉格郡负责管辖，长20公里、宽10公里，面积100.18平方公里，湖岸线长度118公里，海拔高度358米，最大水深220米，蓄水量8.68立方公里。

Tunnsjøen (Southern Sami:Dåtnejaevrie) is a lake in the municipalities of Røyrvik and Lierne in Nord-Trøndelag county, Norway. The 100.18-square-kilometre (38.68 sq mi) lake lies just south of the large lake Limingen, and just west of the border with Sweden. It is 358 metres (1,175 ft) above sea level and has a volume of 8.68 cubic kilometres (2.08 cu mi). The deepest part of the lake is 220 metres (720 ft) deep. It is the seventh largest lake in Norway.