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.
Islam in France
According to , a researcher at INED, an acceptance of 5 to 6 million Muslims in France in 1999 was overestimated. Her work has shown that there were 3.7 million people of "possible Muslim faith" in France in 1999 (6.3% of the total population of Metropolitan France). These 3.7 million people whose ancestry is from countries where Islam is the dominant faith may or may not be observant Muslims themselves. In 2009, she estimated that the number of people of "possible Muslim faith" in France was about 4.5 million.