Île-de-France

Île-de-France, also known as the région parisienne ("Parisian Region"), is one of the 18 regions of France and includes the city of Paris. It covers 12,012 square kilometres (4,638 square miles) and has its own regional council and president. It has a population of 12,005,077 as of January 2014, equivalent to 18.2% of the population of France.
Credit: Wikipedia