It runs from Lac Saint-Jean in the south to the deep interior of northern Quebec in the north.

The next most common mother tongues were the related languages of Atikamekw and Innu at 0.3% total, followed by English and Spanish at 0.3% each.

Additionally there were 0.1% who reported both French and a non-official language as their mother tongue.

As of 2021, Indigenous peoples comprised 6.8% of the population, and visible minorities contributed 1.1%.

The largest visible minority groups in the RCM of Maria-Chapdelaine are Black (0.5%), Arab (0.2%), and Latin American (0.2%).