Saint Denis is the most populous commune in the French overseas departments and the twentieth most populous in all of France. At the 2018 census, there were 309,635 inhabitants in the metropolitan area of Saint Denis (as defined by INSEE), 150,535 of whom lived in the city (commune) of Saint-Denis proper and the remainder in the neighbouring communes of La Possession, Sainte-Marie, Sainte-Suzanne, Saint-André, and Bras-Panon.