Monmouthshire, also known as the County of Monmouth, is one of thirteen historic counties of Wales and a former administrative county. It corresponds approximately to the present principal areas of Monmouthshire, Blaenau Gwent, Newport and Torfaen, and those parts of Caerphilly and Cardiff east of the Rhymney River.
South Glamorgan is a preserved county of Wales.
Mid Glamorgan is a preserved county of Wales. From 1974 until 1996 it was also an administrative county with a county council.
West Glamorgan is a former administrative county in South Wales. It is now a preserved county.
The Local Government Act 1972 is an Act of the Parliament of the United Kingdom that reformed local government in England and Wales on 1 April 1974. It was one of the most significant Acts of Parliament to be passed by the Heath Government of 1970–74.
The Borough of Ogwr was one of six districts of Mid Glamorgan in Wales, which existed from 1974 to 1996.
Monmouth District was one of five local government districts in the county of Gwent in Wales between 1974 and 1996. In 1988 the district was granted a charter conferring borough status, becoming the Borough of Monmouth.
Taff-Ely was a local government district with borough status in Wales from 1974 to 1996.
Rhondda was a local government district in the geographical area of the Rhondda Valley, south Wales, from 1877 until 1996, with various statuses through its history.
Neath was one of the four local government districts of West Glamorgan, Wales from 1974 to 1996.
The Borough of Brecknock was one of the three local government districts of the county of Powys, Wales from 1974 until 1996. It covered the majority of the former administrative county of Brecknockshire. The borough was abolished in 1996, with Powys County Council taking over its functions.
The Newport district was one of the five local government districts of Gwent from 1974 to 1996. The district comprised the county borough of Newport and several surrounding parishes. It inherited the borough status of the former authority and was therefore styled as the Borough of Newport.
The District of Swansea was a local government district with city status in West Glamorgan, Wales from 1974 to 1996.
Rhymney Valley was one of six local government districts in Mid Glamorgan from 1974 to 1996.
St Mellons Rural District is a defunct district council. It was established under the provisions of the Local Government Act 1894 from part of the existing Newport Rural Sanitary District. It comprised the parishes of Bedwas, Bettws, Coedkernew, Duffryn, Graig, Henllys, Machen Lower, Machen Upper, Malpas, Marshfield, Michaelstone-y-Fedw, Peterstone Wentloog, Rogerstone, Rumney, St Brides Wentloog, St Mellons and St Woolos in the administrative county of Monmouthshire. Initially, the St Mellons Rural District Council also administered two parishes in Glamorgan: Llanvedw and Rhydygwern, which had also formed part of the sanitary district. The Glamorgan parishes were annexed to Llandaff and Dinas Powis Rural District in 1895.
Gwent is a preserved county and former local government county in southeast Wales. A county of Gwent was formed on 1 April 1974, under the Local Government Act 1972; it was named after the ancient Kingdom of Gwent. The authority was a successor to both the administrative county of Monmouthshire and the county borough of Newport.
The history of local government in Wales in a recognisably modern form emerged during the late 19th century. Administrative counties and county boroughs were first established in Wales in 1889. Urban and rural districts were formed in 1894. These were replaced in 1974 by a two-tier authority system across the country comprising eight counties and, within them, thirty-seven districts. This system was itself replaced by the introduction of 22 single-tier authorities in 1996.
South Glamorgan County Council was the local government authority that administered the county of South Glamorgan, Wales from its creation in 1974 until its abolition in 1996.
Cardiff Rural District was a second tier local government district of Glamorgan, Wales until 1974. It covered the more rural areas to the west and north of the city of Cardiff.
