Birmingham is located with Warwickshire but , before the 19th and 20th centuries , some parts of it used to belong to Worcestershire .
Birmingham ( , locally also ) is a major city and metropolitan borough in the West Midlands ( County ) , ( one of several Metropolitan Counties set up in 1974 ) with the City in terms of Ceremonial Counties still being within Warwickshire ( although before boundary changes in the 19th and 20th Century parts of the City were originally in Worcestershire ) .