The lac Le Gardeur (English: Le Gardeur Lake) is a freshwater body in the head area of the Sainte-Anne Ouest River in the unorganized territory of Lac-Croche, in the La Jacques-Cartier Regional County Municipality, in the administrative region of Capitale-Nationale, in the province from Quebec, to Canada.

The southern part of the lake is served by a forest road and another pass on the east side.

[1] The surface of Lac Le Gardeur is usually frozen from the beginning of December to the end of March, however the safe circulation on the ice is generally from mid-December to mid-March.

A peninsula attached to the south shore stretches north 1.3 kilometres (0.81 mi).

[1] The toponym Lac Le Gardeur was formalized on December 5, 1968, by the Commission de toponymie du Québec.