In France, there are some municipalities that don't have a single
inhabitant! These are some villages that were devastated in WW 1,
with no inhabitants left, but the municipalities were never
abolished! What this means in practice, I don't know.
Cf.:
Communes sans habitants : six des sept communes de France ne comptant
aucun habitant se trouve dans le périmètre historique du champ de
bataille de Verdun : Beaumont-en-Verdunois, Bezonveux, Haumont-près-
Samogneux, Louvement-Côte-du-Poivre, Cumières-le-Mort-Homme et Fleury-
devant-Douaumont.
Source:
http://vielocale-viepublique.fr/vielocal/cgi-bin/dep.pl?55
Peter S.