Narrow-gauge railways of France

The French National Railways used to run a considerable number of 1,000 mm (3 ft 3+3⁄8 in) metre gauge lines, a few of which still operate mostly in tourist areas, such as the St Gervais-Vallorcine (Alps) and the "Petit Train Jaune" (little yellow train) in the Pyrenees.

The original French scheme was that every sous-prefecture should be rail connected.

Extensive 600 mm (1 ft 11+5⁄8 in) gauge lines were also built for the sugar-beet industry in the north often using ex-military equipment after the First World War.

Decauville was a famous French manufacturer of industrial narrow-gauge railway equipment and equipped one of the most extensive regional 600 mm (1 ft 11+5⁄8 in) narrow-gauge railway, the Chemins de fer du Calvados.

The petit train d'Artouste, a tourist line in the Pyrenees, uses 500 mm (19+3⁄4 in) gauge.