The economy of Belgium is a highly developed, high-income, mixed economy.

The Sillon industriel is the former industrial backbone of Belgium. It runs across the region of Wallonia, passing from Dour, the region of Borinage, in the west, to Verviers in the east, passing along the way through Mons, La Louvière (Centre-region), Charleroi, Namur, Huy, and Liège. It follows a continuous stretch of valleys of the rivers Haine, Sambre, Meuse and Vesdre, and has an area of roughly 1000 km2.