Toulouse is the prefecture of the French department of Haute-Garonne and of the larger region of Occitania. The city is on the banks of the River Garonne, 150 kilometres from the Mediterranean Sea, 230 km from the Atlantic Ocean and 680 km from Paris. It is the fourth-largest city in France after Paris, Marseille and Lyon, with 504,078 inhabitants within its municipal boundaries; its metropolitan area has a population of 1.5 million inhabitants.