A 2008 estimate found that approximately 6% of the Belgian population (628,751 people) is Muslim. Muslims constitute 23.6% of the population of Brussels, 4.9% of Wallonia and 5.1% of Flanders. The majority of Belgian Muslims live in the major cities, such as Antwerp, Brussels and Charleroi. The largest group of immigrants in Belgium are Moroccans, with 400,000 people. The Turks are the third largest group, and the second largest Muslim ethnic group, numbering 220,000.