Saint-Saturnin-lès-Apt is a commune in the Vaucluse department in the Provence-Alpes-Côte d'Azur region in Southeastern France. In 2021…Saint-Saturnin-lès-Apt is a commune in the Vaucluse department in the Provence-Alpes-Côte d'Azur region in Southeastern France. In 2021, it had a population of 2,947. To differentiate the commune's inhabitants from those of Saint-Saturnin-lès-Avignon to the west, the first are called Saturninois and Saturninoises in French, whereas the latter are called Saint-Saturninois and Saint-Saturninoises.