Lille is a city in the northern part of France, in French Flanders. On the Deûle River, near France's border with Belgium, it is the capital of the Hauts-de-France region, the prefecture of the Nord department, and the main city of the Métropole Européenne de Lille.
As of 2017, Lille had a population of 232,787 within its administrative limits, and Lille is the first city of the Métropole Européenne de Lille with a population of 1,146,320, making it the fourth-largest urban area in France after Paris, Lyon, and Marseille. More broadly, it belongs to a vast conurbation formed with the Belgian cities of Mouscron, Kortrijk, Tournai and Menin, which gave birth in January 2008 to the Eurometropole Lille-Kortrijk-Tournai, the first European Grouping of Territorial Cooperation, which has more than 2.1 million inhabitants.
Nicknamed in France the "Capital of Flanders", Lille and its surroundings belong to the historical region of Romance Flanders, a former territory of the county of Flanders that is not part of the linguistic area of West Flanders. A garrison town, Lille has had an eventful history from the Middle Ages to the French Revolution.