From the beginning of the 1880s, the cantons of Haute-Rouge were open to colonization, including those of Lynch and Mousseau where L'Ascension is located today.

This is how the Hamilton Brothers got rid of Ferme d’en Haut, it having become useless to them, in 1886 by selling it to the settler Ambroise Charbonneau.

The latter was encouraged by the success of other colonization ventures on the Rouge which had taken place a few years previously in addition to the productivity of the farm he had just purchased, Ferme d’en Haut.

[1] Mother tongue (2021):[3] L'Ascension forms part of the federal electoral district of Laurentides—Labelle and has been represented by Marie-Hélène Gaudreau of the Bloc Québécois since 2019.

Provincially, L'Ascension is part of the Labelle electoral district and is represented by Chantale Jeannotte of the Coalition Avenir Québec since 2018.

List of former mayors: Sainte Agathe Academy (of the Sir Wilfrid Laurier School Board) in Sainte-Agathe-des-Monts serves English-speaking students in this community for both elementary and secondary levels.