Roussillon is a commune in the Vaucluse department of the Provence-Alpes-Côte d'Azur region in Southeastern France. Roussillon lies within the borders of the Natural Regional Park of Luberon. In the French natural regional parks system, new economic activities may be developed only if they are sustainable.

The Luberon is a massif in central Provence in Southern France, part of the French Prealps. It has a maximum elevation of 1,256 metres (4,121 ft) and an area of about 600 square kilometres (230 sq mi). It is composed of three mountain ranges : Lesser Luberon, Greater Luberon and Eastern Luberon. The valleys north and south of them contain a number of towns and villages as well as agricultural land; the northern part is marked by the Calavon, while the southern part is characterised by the Durance.