The railway line between Pamiers and Limoux (French: Ligne de Pamiers à Limoux) is a former French 63.1 km railway located in the departments of the Aude and Ariège.

Built by the Compagnie des chemins de fer du Midi the line opened in two stages in 1898 and had its last section closed in 1973.

The law of 17 July 1879 (Freycinet Plan) classified 181 railway lines as being in general interest, with number 163 being between "d'un point à déterminer entre Pamiers et Saint-Antoine-de-Foix à un autre point à déterminer entre Limoux et Quillan".

[2] It was granted to the Compagnie des Chemins de Fer du Midi by a contract signed by the Minister of Public Works and the company on 9 June 1883.

The railway line was removed from service in three steps: Beginning in 2007, the Conseil Départemental de l'Ariège undertook the transformation of the railway between Mirepoix and Moulin-Neuf into a voie verte.