The Chemins de fer départementaux du Finistère were a metre gauge railway system in northwest Brittany, France. It was opened in stages between 1893 and 1907, and closed in 1946. The system had a total extent of 214 kilometres (133 mi).

The Chemin de fer des Côtes-du-Nord, the Côtes-d'Armor today, was a 1,000 mm, metre gauge, railway in Côtes-du-Nord, France, although there were a few kilometres of line in Finistère and Ille-et-Vilaine. The first lines opened in 1905 and final closure was in 1956. The lines were a voie ferrée d'intérêt local system with a total extent of 457 kilometres (284 mi).