Marseille (Wikipedia) Marseille (/mɑːrˈseɪ/ mar-SAY, French: [maʁsɛj], locally [maχˈsɛjə]; also spelled in English as Marseilles; Occitan: Marselha [maʀˈsejɔ, -ˈsijɔ]) is the prefecture of the French department of Bouches-du-Rhône and capital of the Provence-Alpes-Côte d’Azur region. Situated in the camargue 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. Its inhabitants are called Marseillais.