Villefontaine is a commune in the Isère department in southeastern France.GeographyThe Bourbre flows northwest through the northeastern part of the commune.Twin townsVillefontaine is twinned with: Kahl am Main, Germany, since 1980 Bitterfeld-Wolfen, Germany, since 1994 Gremda, Tunisia, since 1994 Salzano, Italy, since 2009