Marseille or Marseilles (French: Marseille; Provençal Occitan: Marselha; see below) is the prefecture of the French department of Bouches-du-Rhône and of the Provence-Alpes-Côte d'Azur region. Situated in the Provence region of southern France, it is located on the coast of the Gulf of Lion, part of the Mediterranean Sea, near the mouth of the Rhône river. A resident of Marseille is a Marseillais. Marseille is the third largest city in France by urban area (when combined with Aix-en-Provence), and the second most populous city in France, with 873,076 inhabitants in 2021 (Jan. census)[7] over a municipal territory of 241 km2 (93 sq mi). Together with its suburbs and exurbs, the Marseille metropolitan area, which extends over 3,972 km2 (1,534 sq mi), had a population of 1,888,788 at the Jan. 2021 census,[6] the third most populated in France after those of Paris and Lyon. The cities of Marseille, Aix-en-Provence, and 90 suburban municipalities have formed since 2016 the Aix-Marseille-Provence Metropolis, an indirectly elected metropolitan authority now in charge of wider metropolitan issues, with a population of 1,911,311 at the Jan. 2021 census.[8]