Saint-Alexis-des-Monts (French pronunciation: [sɛ̃t‿alɛksi de mɔ̃]) is a parish municipality in the Mauricie region of the province of Quebec in Canada.

The town depends on outdoor tourism that increases its seasonal population to between 8000 and 10,000 persons.

On October 30 of that year, Alexis Lefebvre Boulanger (1812-1885), pioneer and farmer, donated the land on which the village's chapel was built in 1867, and the church in 1884.

On April 21, 1984, Belleau rejoined Saint-Alexis-des-Monts again, and the parish municipality had a surface area of more than 500 square kilometres (190 sq mi).

On December 9, 1995, 763 square kilometres (295 sq mi) was added following the annexation of the Lac-Marcotte and Lac-au-Sorcier unorganized territories.