Despite the title of "village municipality" and the formalities that go along with it (for instance, having a mayor), Statistics Canada lists it (and all other Cree village municipalities in Quebec) as having few resident population or residential infrastructure (dwellings); it is the Cree reserved lands that are listed as having most of the population and residential dwellings in the 2021 census, the 2016 census, and earlier censuses.

The village is located on the Watso peninsula in the form of a large C (open to the northeast) attached to the east bank, forming the north-eastern shore of the Du Poste Bay, barring the exit of this bay and including the village of Mistissini in the North-West.

The Cree have lived in the area of the watershed of the Rupert River and around Lake Mistassini for centuries.

The itinerary of the trip moved south - first by Oskelaneo when the railway was built in 1910, and later by the region of Lac Saint-Jean.

Over time, Mistissini and the various posts in the area have been designated: "Maison Dorval", "Patagoosh", "Abatagoushe", "Mistassini" and "Baie-du-Poste".