The Borough of Slough is a borough with unitary authority status in the ceremonial county of Berkshire, Southern England. The borough is centred around the town of Slough and includes Langley. It forms an urban area with parts of Buckinghamshire and extends to the villages of Burnham, Farnham Royal, George Green, and Iver. Part of the district's area was in Buckinghamshire prior to the district's formation and in Middlesex until 1965.