Plombières (German:Bleyberg or Bleiberg, Dutch: Blieberg) is a Walloon municipality located in the Belgian province of Liège. On January 1 2006, Plombières had a total population of 9,672. The total area is 53.17 km² which gives a population density of 182 inhabitants per km². The municipality Plombières consists of the villages Gemmenich, Hombourg, Montzen, Moresnet and Sippenaeken.