The Île-de-France was inhabited by the Parisii, a sub-tribe of the Celtic Senones, from around the middle of the 3rd-century BC. The region has witnessed increasing income inequality in recent decades and rising housing prices have pushed the less affluent outside Paris. Though it is the richest French region, a significant number of residents live in poverty: the official poverty rate in the Île-de-France was 15.9% in 2015. īeyond the city limits of Paris, the region has many other important historic sites, including the palaces of Versailles and Fontainebleau, as well as the most-visited tourist attraction in France, Disneyland Paris.

In 2018, nearly all of the twenty-eight French companies listed in the Fortune Global 500 were based in the Île-de-France. The Île-de-France region alone accounts for 5% of the European Union's GDP, for only about 2.7% of the Union's population. It has the highest per capita GDP of any French region and the third highest of any region in the European Union. The GDP of the region in 2018 was €738 billion (or US$882 billion at market exchange rates). Residents are sometimes referred to as Franciliens, an administrative word created in the 1980s. In 1976, when its status was aligned with the French administrative regions created in 1972, it was renamed after the historic province of Île-de-France. It was created as the 'District of the Paris Region' in 1961. The region is made up of eight administrative departments: Paris, Essonne, Hauts-de-Seine, Seine-Saint-Denis, Seine-et-Marne, Val-de-Marne, Val-d'Oise and Yvelines. Île-de-France is densely populated and retains a prime economic position on the national stage: though it covers only 12,012 square kilometres (4,638 square miles), about 2% of metropolitan French territory, its 2017 population was nearly one-fifth of the national total its economy accounts for nearly one-third of the French gross domestic product.

Centred on the capital Paris, it is located in the north-central part of the country and often called the Région parisienne ( pronounced English: Paris Region ). The Île-de-France ( / ˌ iː l d ə ˈ f r ɒ̃ s/, French: ( listen) literally 'Isle of France') is the most populous of the eighteen regions of France.

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