The Petit lac Jacques-Cartier is a freshwater body that flows into the rivière Jacques-Cartier Sud, in the unorganized territory of Lac-Jacques-Cartier, in the La Côte-de-Beaupré Regional County Municipality, in the administrative region of Capitale-Nationale, in province from Quebec, in Canada.

He explored the Anticosti Island, the Gulf of St. Lawrence and, on July 24, he erected a cross in the bay of Gaspé as a sign of appropriation of the site.

During his second trip, in 1535, Cartier went up the St. Lawrence River to Hochelaga (Montreal) and spent a difficult winter in Stadaconé (Quebec).

First cartographer of the St. Lawrence, he recognizes that the gold and diamonds found turn out to be iron pyrite and quartz.

The toponym "Petit lac Jacques-Cartier" was formalized on December 5, 1968, by the Commission de toponymie du Québec.