Paris instance of million city
In the early 21st century, the population of Paris began to increase slowly again, as more young people moved into the city. It reached 2.25 million in 2011. In March 2001, Bertrand Delanoë became the first Socialist Mayor of Paris. In 2007, in an effort to reduce car traffic in the city, he introduced the Vélib', a system which rents bicycles for the use of local residents and visitors. Bertrand Delanoë also transformed a section of the highway along the Left Bank of the Seine into an urban promenade and park, the Promenade des Berges de la Seine, which he inaugurated in June 2013.In 2007, President Nicolas Sarkozy launched the Grand Paris project, to integrate Paris more closely with the towns in the region around it. After many modifications, the new area, named the Metropolis of Grand Paris, with a population of 6.7 million, was created on 1 January 2016. In 2011, the City of Paris and the national government approved the plans for the Grand Paris Express, totalling 205 km (127 mi) of automated metro lines to connect Paris, the innermost three departments around Paris, airports and high-speed rail (TGV) stations, at an estimated cost of €35 billion. The system is scheduled to be completed by 2030.Demographics
The official estimated population of the City of Paris on 1 January 1, 2023 was  2,102,650, down from 2,165,423 on January 1, 2022, according to the INSEE, the official French statistical agency. According to INSEE, the population has dropped by 122,919, or about five percent, over the past decade. The Mayor of Paris, Anne Hidalgo, declared that this was a positive development, illustrating the "de-densification" of the city, creating more green space and less crowding.  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, the departure of middle-class residents and the possible loss of housing in the city due to short-term rentals for tourism.Paris is the fourth largest municipality in the European Union, following Berlin, Madrid and Rome. Eurostat places Paris (6.5 million people) behind London (8 million) and ahead of Berlin (3.5 million), based on the 2012 populations of what Eurostat calls "urban audit core cities".
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