The Diocese of Pamiers, Couserans, and Mirepoix (Latin: Dioecesis Apamiensis, Couseranensis, et Mirapicensis; French: Diocèse de Pamiers, Mirepoix, et Couserans) is a Latin Church diocese of the Catholic Church in southern France.
Erected in 1295, it was a historical diocese of county of Foix. The diocese was suppressed in 1801, it was restored in 1822. The diocese comprises the department of Ariège and is suffragan to the Archdiocese of Toulouse. The diocese of Pamiers is divided into five Deaneries: Pamiers, Foix, Haut-Ariège, Couserans, and Pays-d'Olmes-Mirapoix. The episcopal see is the Cathedral of Saint Antoninus in the city of Pamiers.