Saint-Jean-de-Sixt is a commune in the Haute-Savoie department in the Rhône-Alpes region in southeastern France.It lies in the Aravis Range of the French Alps. The inhabitants are the Saintjeandais or Saintjeandins.The village used to be called Villaret, when it was a part of the Kingdom of Savoy, prior to its incorporation into France in 1860.