Demographics of France
The demography of France is monitored by the Institut national d'études démographiques (INED) and the Institut national de la statistique et des études économiques (INSEE). As of 1 January 2018, 67.19 million people lived in France (67,186,638), including all the five overseas departments (2,141,000), but excluding the overseas collectivities and territories (604,000). 65,017,000 of these lived in Metropolitan France, which is mainland France located in Europe.
Paris
The official estimated population of the city of Paris was 2,206,488 as of January 1, 2019, according to INSEE, the official French statistical agency. This is a decline of 59,648 from 2015, close to the total population of the 5th arrondissement. Despite the drop, Paris remains the most densely-populated city in Europe, with 252 residents per hectare, not counting parks. This drop was attributed partly to a lower birth rate, to the departure of middle-class residents. and partly to the possible loss of housing in the city due to short-term rentals for tourism.
Paris is the core of a built-up area that extends well beyond its limits: commonly referred to as the "agglomération Parisienne", and statistically as a "unité urbaine" (a measure of urban area), the Paris agglomeration's 2013 population of 10,601,122 made it the largest urban area in the European Union. City-influenced commuter activity reaches well beyond even this in a statistical "aire urbaine" de Paris (a measure of metropolitan area), that had a 2013 population of 12,405,426, a number one-fifth the population of France, the largest metropolitan area in the Eurozone.