Jonchères is situated in the valley of Béous, on the small sinuous road which rises since Luc-en-Diois towards the collar of Prémol (964 m. point of view) and the village of Motte-Chalancon.
The municipality is situated in the South of the regional natural reserve of Vercors. She is overhung by the mountain of Vellan and surrounded with the valleys of Gervanne and with Rieussec.
Situated in the valley of the Drôme, the village of Ponet-et-Saint-Auban belongs to Die's district and to Die's canton. The municipality is a part of the Regional Natural reserve of Vercors.