Lakes of Telemark

Tinnsjå (also known as Tinnsjø or Tinnsjøen; ) is one of the largest lakes in Norway measuring about . At a depth of it is the third deepest lake in Norway and Europe. Tinnsjå is located in the municipalities of Tinn and Notodden in Telemark county. At its source in the west, the Måna river flows out of the lake Møsvatn and past the town of Rjukan into Tinnsjå. From the north, the river Mår flows from the lakes Mår, Gøystavatn, and Kalhovdfjorden into Tinnsjå. Tinnsjå is part of the Skien watershed, and it drains via the Tinnelva river in the south, down to the lake Heddalsvatn.

Møsvatn or Møsvann is a lake in Vinje Municipality in Telemark county, Norway. It is the tenth-largest lake in Norway with a surface area of and a volume of . The lake lies just east of the Hardangervidda National Park, in Skien watershed (Skiensvassdrag) catchment area. The lake discharges into the Måna river at a dam located on the Vinje-Tinn municipal border (so a very small part of the lake crosses into Tinn Municipality too). The lake has an irregular shape with three arms. The longest length across the lake is about . Møsvatn is a shallow mountain lake by Norwegian standards, reaching a

Bandak is a lake in the municipalities of Kviteseid and Tokke in Telemark county, Norway. The lake, which is part of the Telemark Canal route, belongs to the Skien watershed. The river Tokke flows into the lake, and the outlet is via the river Strauman, which flows to the lake Kviteseidvatn.

Totak is a lake in Vinje Municipality in Telemark county, Norway. The lake is located in the Rauland area, about to the north of the village of Åmot. The lake is part of the Skien river watershed (Skiensvassdraget), discharging via the river Tokke which flows into the lake Bandak to the south. At deep, Totak is the 11th deepest lake in Norway. This tremendous overdeepening marks it as a glacially formed lake with characteristics similar to a fjord. Its volume of makes it the 24th largest by volume as well. Totak is Norway's deepest lake that is not a cryptodepression. The lake's basin is well

Norsjø is a lake in the municipalities of Skien, Nome, and Midt-Telemark in Telemark county, Norway. The lake sits at an elevation of above sea level.

Nisser is a lake in Telemark county, Norway. It is located in Nissedal and Kviteseid municipalities, and is Telemark's largest lake. The lake is the 10th-largest lake in the nation by area with a surface area of (when artificial lakes are excluded). The 8th largest by volume at . The 16th deepest at . Nisser has the greatest average depth of the Norwegian lakes that is not a cryptodepression. Its entire lakebasin is above sealevel. As part of the Arendal watershed, water enters this lake from the discharge from the nearby lake Vråvatn, and its outlet is the Nisserelva river which later becomes

Fyresvatnet or Fyresvatn is a lake in Fyresdal Municipality in Telemark county, Norway. With a depth of , the lake is the fifth-deepest lake in Norway. The lake stretches about from the village of Kilegrend in the south to Moland in the north.

Seljordsvatnet () is a lake in Seljord Municipality in Telemark county, Norway. A small part of the very far eastern edge of the lake crosses over into Midt-Telemark Municipality. The lake is part of the Skien watershed. The lake's main inflow is the river Vallaråi and the lake drains through the river Bøelva. According to local folklore, Selma the sea serpent () lives in the lake.

Farris is a lake on the border of Telemark and Vestfold counties in Norway. The long freshwater moraine-dammed lake is located mostly in Larvik Municipality in Vestfold, but the northwestern part of the lake is located in Siljan Municipality and Porsgrunn Municipality in Telemark. The large town of Larvik is located at the southern end of the lake.

Kviteseidvatn or Kviteseidvatnet is a lake in the municipality of Kviteseid in Telemark county, Norway. The lake is part of the Telemark Canal and lies in the Skien watershed. The lake's water level was first regulated in 1892.

Flåvatn is a lake in the municipalities of Nome and Kviteseid in Telemark county, Norway. The lake is the easternmost of the three connected lakes Bandak, Kviteseidvatnet and Flåvatn, which are all part of the Telemark Canal. The lake's area is . The outlet is via the river Straumen (Eidselva) which flows down to the lake Norsjø.

Songavatnet (also spelled as Songevatnet or Songavatn) is a lake in Vinje Municipality in Telemark county, Norway. It has a surface area of and lies at an elevation of . The lake lies just south of the border of Hardangervidda National Park and just southeast of the mountain Vassdalseggi. The villages of Haukeli and Edland are both located about to the south of the lake and the village of Arabygdi lies about to the southeast of the lake. The lake flows out into the river Songa which flows to the southeast into the nearby lake Totak.

Heddalsvatnet () is a lake in Notodden Municipality and Midt-Telemark Municipality in Telemark county, Norway. The lake is located just south of the town of Notodden. The village of Heddal and the Heddalen valley are located to the northwest of the lake.

Kalhovdfjorden is a lake in Tinn Municipality in Telemark county, Norway. The lake lies about to the north of the town of Rjukan and about east of the Hardangervidda National Park. The lake is part of the Skien watershed. The river Mår is the main outflow of the lake. The lake Møsvatn lies to the southwest and the lake Tinnsjå lies to the southeast. The area of the lake is and it is located above sea level.

group of lakes in Bamble, Drangedal and Kragerø, Telemark, Norway

lake in Bykle (Aust-Agder), Suldal (Rogaland) and Vinje (Telemark), Norway

Byrtevatn is a lake in Tokke Municipality in Telemark county, Norway. The lake is located about northwest of the village of Dalen. The main natural influx comes from the river Byrteåi. Byrtevatn has a dam on the south end of the lake which regulates the surface elevation of the lake. Water from the nearby lake Botnedalsvatn flows through a tunnel into the Byrte Hydroelectric Power Station and the water is then released into this lake.

Vinjevatn is a lake in Vinje Municipality in Telemark county, Norway. The lake lies a short distance to the northwest of the village of Åmot. The village of Vinje lies at the north end of the lake. The main natural influx comes from the river Smørkleppåi, and the lake drains through the river Vinjeåi which meets the river Tokke at Åmot. The lake is part of the Skien watershed. The European route E134 highway runs along the northern shore of the lake.

Botnedalsvatn is a lake in Tokke Municipality in Telemark county, Norway. The lake is located in the Botnedalen valley, about to the northwest of the village of Dalen. Botnedalsvatn has a dam on the southeast end of the lake which regulates the surface elevation of the lake. The lake is used as a reservoir for the nearby Byrte Hydroelectric Power Station. Water flows from this lake through a tunnel into the power plant which is located at the southern end of the nearby lake Byrtevatn.