 The bulk of the urban districts of Bilston (a borough itself after 1933), Tettenhall and Wednesfield were added to the borough in 1966, along with the northern section of the urban district of Coseley and parts from the north of Sedgley and the west of Willenhall.The vast majority of these areas were traditionally part of the Parish of Wolverhampton, and were part of the original Parliamentary Borough.Wolverhampton was one of only two County Boroughs (the other being Liverpool) to have no changes made to the boundary during the 1974 reorganisation of local government, the borough already having a population larger than the 250,000 required for education authorities.