Lake Morat (French: Lac de Morat (official name); German: Murtensee) is a lake located in the cantons of Fribourg and Vaud in the west of Switzerland. It is named after the small bilingual town of Murten/Morat on its southern shore.

It is the smallest of the three lakes in the Seeland or Pays des trois lacs area of the Swiss plateau located at the foot of the first chain of the Jura mountains. The main tributary is the river Broye.