Aix-en-Provence is a city-commune in southern France, some 30 km (19 mi) north of Marseille. It is in the region of Provence-Alpes-Côte d'Azur, in the département of Bouches-du-Rhône, of which it is a sub prefecture. The population of Aix is approximately 143,000. Its inhabitants are called Aixois or, less commonly, Aquisextains.