The Archdiocese of Cotonou (Latin: Archidioecesis Cotonuensis) is the Latin Church archdiocese of the Catholic Church in Cotonou in Benin.

It is the metropolitan see of the ecclesiastical province of Cotonou.

The seat of the archbishop is the cathedral of Notre Dame de Miséricorde (Our Lady of Mercy) in Cotonou.

Basilique de l'Immaculée Conception (Basilica of the Immaculate Conception) is a minor basilica in Cotonou.