Taurignan-Castet

Caumont (French pronunciation: [komɔ̃]) is a commune in the Ariège department of southwestern France.

Mercenac (French pronunciation: [mɛʁsənak]) is a commune in the Ariège department in southwestern France.

Taurignan-Vieux (French pronunciation: [toʁiɲɑ̃ vjø]; Occitan: Taurinhan eth Vielh) is a commune in the Ariège department in southwestern France.

Gajan (French pronunciation: [ɡaʒɑ̃]) is a commune in the Ariège department in southwestern France.

Lorp-Sentaraille (French pronunciation: [lɔʁp sɑ̃taʁaj]; Occitan: Lòrp e Senta Aralha) is a commune in the Ariège department in southwestern France.

Montgauch is a commune in the Ariège department in southwestern France.

Saint-Lizier (French pronunciation: [sɛ̃ lizje]; Occitan: Sent Líser) is a commune in the Ariège department in southwestern France, situated on the river Salat.

Notre-Dame-de-la-Sède Cathedral (French: Cathédrale Notre-Dame-de-la-Sède de Saint-Lizier) is one of two former co-cathedrals of the town of Saint-Lizier in southern France. The other is the Saint-Lizier Cathedral. The town of Saint-Lizier was formerly the seat of the Bishop of Couserans. The diocese was abolished under civil constitution of the clergy in 1790, and this was confirmed by the Concordat of 1801.

Saint-Lizier Cathedral (French: Cathédrale Saint-Lizier de Saint-Lizier) is one of two former co-cathedrals of the town of Saint-Lizier in southern France. The other is the Notre-Dame-de-la-Sède Cathedral. The Saint-Lizier Cathedral is dedicated to Saint Lycerius (French: Saint Lizier), an early bishop of Couserans, after whom the town itself is also named. It has been listed since 1886 as a monument historique by the French Ministry of Culture.The town of Saint-Lizier, although now severely depopulated, was formerly the seat of the Bishop of Couserans. The diocese was abolished under civil constitution of the clergy in 1790, and this was confirmed by the Concordat of 1801.

Cazavet (French pronunciation: [kazavɛ]; Occitan: Casavèth) is a commune in the Ariège department in southwestern France.

The former French Catholic diocese of Couserans existed perhaps from the fifth century to the French Revolution in the late eighteenth century. It covered the former province of Couserans, in south-west France. Its episcopal seat was in Saint-Lizier, a small town to the west of Foix. It was a suffragan of the archdiocese of Auch.

The canton of Portes du Couserans is an administrative division of the Ariège department, southern France. It was created at the French canton reorganisation which came into effect in March 2015. Its seat is in Saint-Lizier.It consists of the following communes: