France

Operating or Under Construction

Angers
Bordeaux
Bourg-St. Maurice-Les Arc
Caen
Clermont-Ferrand
Grenoble
Laon
Le Mans
Leyman
Lille
Lyon
Marseille 
Mont Blanc
Montpellier
Mulhouse
Nancy
Nantes
Nice
Orleans
Paris
Rennes
Rouen
Saint-Etienne (Paris)
Strassbourg
Tignes
Toulon
Toulouse
Val d'Isere
Ville Valenciennes
Villefranche-La Tour de Carol

Planned

Brest
Douai
Dunkerque
Fort-de-France (Martinique)
Le Havre
Reims
Tours

Honorable Mention
La Rochelle
Loire Region
Marne

Val d'Isere 

Does the FuniVAL qualify as a subway? Well, the 1 km funicular transports passengers and is 80% underground. You decide.