Lake Tinn (tinnsjå) is the 3^rd deepest lake in Europe at 460 meters.

Lake Tinn (tinnsjå) is a lake that holds up to 9.71 km³ of water, reaching a maximum depth of 460 meters. The lake also covers 51 km² in surface area.

Countries along its shoreline in Europe: Norway.

Its water is found to contain traces of heavy water (deuterium oxide), due to sinking of the ferry SF Hydro during World War 2 (in 1994). SF Hydro was said to contain large quantities of heavy water produced at Vemork, a factory located in Rjukan, and was en route to Germany for purpose of nuclear weapon research.

 Compare Lake Tinn (tinnsjå) with Loch Morar from Scotland.

 Compare Lake Tinn (tinnsjå) with Loch Awe from Scotland.