Mickaël Cosson, born November 29, 1975, in Saint-Brieuc, is a French politician.

A civil servant with the Direction départementale des territoires et de la mer (DDTM), his political career began in Hillion in 2014, the year he was elected mayor of the commune: he beat the list led by outgoing divers gauche mayor Yvette Doré.

Widely re-elected first mayor in 2020, he is a candidate in the 2021 departmental elections in the canton of Trégueux.

Paired with outgoing departmental councillor Sylvie Guignard, he was defeated in the second round by left-wing union candidates Denis Hamayon and Christine Métois-Le Bras.

In 2022, the outgoing MP for the first constituency, Bruno Joncour, did not stand for a second term, and Mickaël Cosson was nominated by the "Ensemble" coalition, which brings together the political movements of the presidential majority.