Lake Neuchâtel (French: Lac de Neuchâtel; German: Neuenburgersee) is a lake primarily in Romandy, Switzerland (French-speaking Switzerland). The lake lies mainly in the canton of Neuchâtel, but is also shared by the cantons of Vaud, of Fribourg, and of Bern.With a surface of 218.3 km², it is the largest lake entirely in Switzerland and the 59th largest lake in Europe. Lake Neuchâtel lies approximately at coordinates 46°54′N 6°51′E. It is 38.3 km long and no more than 8.2 km wide.