Saint-Pierre-en-Faucigny (French pronunciation: [sɛ̃ pjɛʁ ɑ̃ fosiɲi]) is a commune in the Haute-Savoie department in the Auvergne-Rhône-Alpes region in Eastern France.

It was born from the fusion in 1965 of the communes of Passeirier, Saint-Maurice-de-Rumilly and Saint-Pierre-de-Rumilly.

Saint-Pierre-en-Faucigny is situated between Bonneville just to the east and La Roche-sur-Foron to the west.

The commune has a railway station, Saint-Pierre-en-Faucigny, on the La Roche-sur-Foron–Saint-Gervais-les-Bains-Le Fayet line.

Saint-Pierre-en-Faucigny is twinned with Saint-Pierre, Aosta Valley, Italy.