Districts created since 1853 in the county of Durham, England
They had been successive district administration in the County of Durham. The ancient county was formerly structured around the Bishop of Durham with ancient wards and boroughs.
A borough could either have or not have a rural controlled from the same set of municipal buildings. A municipal borough’s area was part-governed by the administrative county; a municipal borough could become a county borough which was only ceremonially linked with the county.
unitary authority under the Local Government Act 1992. Darlington borough became a unitary authority in 1995. The county of Cleveland disbanded in 1996, Boroughs of Hartlepool and of Stockton-on-Tees became unitary authorities in the ceremonial county. The Borough of Stockton-on Tees is split between the ceremonial counties of Durham and North Yorkshire.
The non-metropolitan county was subject to 2009 reforms. The council county, districts and boroughs were merged into a unitary authority. The ceremonial county now covers four unitary authorities: