Faucigny (French pronunciation: [fosiɲi]; Arpitan: Feûfnyi) is a commune in the Haute-Savoie department in the Auvergne-Rhône-Alpes region in south-eastern France.

Historically, Faucigny was a region in Savoy which included the area of the modern département of Haute Savoie and the municipalities of Chamonix, Argentière, and Les Houches.

The fertile valley of the Arve and the area around Faucigny were already settled in neolithic times, and there are numerous Roman ruins.

During this time, suzerainty over Faucigny was contested between the House of Savoy and the Dauphin de Viennois.

Savoy fought to regain the Faucigny region, but was unsuccessful and Faucigny became part of France in 1349 as part of the purchase from Humbert II de La Tour du Pin, Dauphin de Viennois of the Dauphiné lands.