The Hanotaux Bay is a freshwater body located in the south-west part of Gouin Reservoir, in the territory of the town of La Tuque, in the administrative region of Mauricie, in the province of Quebec, in Canada.

The surface of Hanotaux Bay is usually frozen from mid-November to the end of April, however, safe ice circulation is generally from early December to late March.

This hydronym evokes the work of life of the academician Gabriel Hanotaux (Beaurevoir, Ainse, 1853 - Paris, 1944) including his participation in the First Congress of the French language in Canada held in Quebec City in 1912 Hanotaux was president of the Champlain Mission composed of several French personalities, politicians and men of letters.

Archivist-paleographer, Hanotaux is a professor at the "Ecole des Hautes Etudes" before becoming a Foreign Affairs Attaché and fulfilling several diplomatic missions, notably in Constantinople.

From 1930 to 1934, he published, in collaboration, a History of the French colonies and the expansion of France in the world, a work where Canada and Quebec occupy a good place.