Lac du Verney (French pronunciation: [lak dy vɛʁnɛ]) is an artificial reservoir in the department of Isère, in the Rhône-Alpes of France. It serves as the lower reservoir for the Grand'Maison Dam pumped-storage scheme.

Neighbouring lakeside communities include Oz and Allemond.

Since 2006 it has hosted the opening swim of the Alpe d'Huez Triathlon.