Lac de Bret is a lake in the municipality of Puidoux, in the canton of Vaud, Switzerland. It is located north of Lake Geneva. The natural lake is used as a drinking water reservoir for the city of Lausanne. The first dam was built 1875 to supply water for the Lausanne-Ouchy funicular.

• List of lakes of Switzerland

• Media related to Lac de Bret at Wikimedia Commons
• L'eau potable du lac de Bret (in French)
• Hiking around the lake (in French)
• Fishing on Lac de Bret (in French)