Viuz-en-Sallaz (French pronunciation: [vjy ɑ̃ sala]; Arpitan: Viu) is a commune in the Haute-Savoie department and Auvergne-Rhône-Alpes region of eastern France, close to the Swiss border.

It was historically a possession of the noble house of de Faucigny and then passed to Ardutius de Faucigny, Bishop of Geneva and successive prince-bishops.

It stayed in the possession of the church until the French Revolution.

There is a statue of St Francis de Sales, then Bishop of Geneva, in Viuz.

This Haute-Savoie geographical article is a stub.