Provence-Alpes-Côte d’Azur is one of the 18 administrative regions of France, the far southeastern on the mainland. Its capital is Marseille. The region is roughly coterminous with the former French province of Provence, with the addition of the following adjacent areas: the former papal territory of Avignon, known as Comtat Venaissin; the former Sardinian-Piedmontese county of Nice, whose coastline is known in English as the French Riviera, and in French as the Côte d’Azur; and the southeastern part of the former French province of Dauphiné, in the French Alps. Previously known by the acronym PACA, the region adopted the name Région Sud as a commercial name or nickname in December 2017. 4,935,576 people live in the region according to the 2012 census.
It encompasses six departments in Southeastern France: Alpes-de-Haute-Provence, Alpes-Maritimes, Bouches-du-Rhône, Hautes-Alpes, Var and Vaucluse. It is bounded to the east by the France-Italy border, to the south by the Mediterranean Sea and by the Principality of Monaco, to the north by Auvergne-Rhône-Alpes, and to the west by Occitanie, with the Rhône river marking its westernmost border.