Françoise Lake is a freshwater body of the southern part of Eeyou Istchee James Bay (municipality), in the administrative region of Nord-du-Québec, in the province of Quebec, in Canada.

The area of Lac Françoise extends into the townships of Grandis and du Guesclin, in the territory of the Eeyou Istchee James Bay (municipality), southwest of Chapais, Quebec.

The hydrographic slope of Lac Francoise is accessible via the forest road R1051 coming from the North and serving the large peninsula which stretches out on the east side for 15 kilometres (9.3 mi).

The mouth of this lake Françoise is directly connected to the West by a short strait in Lac Du Guesclin.

The toponym "lake Françoise" was formalized on July 15, 1970, by the Commission de toponymie du Québec when it was created.