The Black Country is a loosely defined area of England's West Midlands. It is mainly urban, covering most of the Dudley and Sandwell metropolitan boroughs, with the Metropolitan Borough of Walsall and the City of Wolverhampton. The 14-mile (23 km) road between Wolverhampton and Birmingham was described as "one continuous town" in 1785.
The area was one of the Industrial Revolution's birthplaces. Its name was first recorded in the 1840s, and derives either from the 30 foot (9.1 m) thick coal seam close to the surface or the production of coal, coke, iron, glass, bricks and steel which produced high levels of soot and air pollution.