The Dauphiné Prealps (French: Préalpes du Dauphiné) are a mountain range in the south-western part of the Alps.

They are located in Rhône-Alpes and, marginally, in Provence-Alpes-Côte d'Azur (south-eastern France).

The Dauphiné (pronounced [dofine]) is a historical region whose area roughly corresponded to that of the present departments of Isère, Drôme, and Hautes-Alpes.

Administratively the French part of the range belongs to the French departments of Isère, Drôme, Hautes-Alpes and, marginally, Alpes-de-Haute-Provence.

According to SOIUSA (International Standardized Mountain Subdivision of the Alps) the mountain range is an Alpine section, classified in the following way:[3] Dauphiné Prealps' borders are (anticlockwise): The Dauphiné Prealps are divided into five Alpine subsections:[3] Some notable summits of the range are: Some notable passes of the range are: