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).

In France, a voie ferrée d'intérêt local, abbreviated VFIL, is a secondary railway constructed by a local administrative division, serving sparsely populated rural areas. These areas were beyond the economic reach of the networks of the intérêt général, which were concessions of the grandes compagnies who ran their lines for profit.