In 1974 Wales was divided for local government purposes into districts. Several districts made up an administrative county, of which there were 8. This system of two-tier local government was abolished in 1996 and replaced with a system of counties and county boroughs.

Former districts

District	Adm. County	Successor
Aberconwy	Gwynedd	Conwy
Alyn and Deeside	Clwyd	Flintshire
Anglesey	Gwynedd	Anglesey
Arfon	Gwynedd	Gwynedd
Blaenau Gwent	Gwent	Blaenau Gwent, part to Monmouthshire
Brecknock	Powys	Powys
Cardiff	South Glamorgan	Cardiff
Carmarthen	Dyfed	Carmarthenshire
Cynon Valley	Mid Glamorgan	Rhondda Cynon Taff
Ceredigion	Dyfed	Ceredigion
Colwyn	Clwyd	Conwy, part to Denbighshire
Delyn	Clwyd	Flintshire
Dinefwr	Dyfed	Carmarthenshire
Dwyfor	Gwynedd	Gwynedd
Islwyn	Gwent	Caerphilly
Llanelli	Dyfed	Carmarthenshire
Lliw Valley	West Glamorgan	split between Neath Port Talbot, Swansea
Glyndwr	Clwyd	Denbighshire, part to Powys, Wrexham
Meirionnydd	Gwynedd	Gwynedd
Merthyr Tydfil	Mid Glamorgan	Merthyr Tydfil
Monmouth	Gwent	Monmouthshire
Montgomeryshire	Powys	Powys
Neath	West Glamorgan	Neath Port Talbot
Newport	Gwent	Newport
Ogwr	Mid Glamorgan	Bridgend, part to Vale of Glamorgan
Port Talbot	West Glamorgan	Neath Port Talbot
Preseli	Dyfed	Pembrokeshire
Radnorshire	Powys	Powys
Rhondda	Mid Glamorgan	Rhondda Cynon Taff
Rhuddlan	Clwyd	Denbighshire
Rhymney Valley	Mid Glamorgan	Caerphilly
South Pembroke	Dyfed	Pembrokeshire
Swansea	West Glamorgan	Swansea
Taff-Ely	Mid Glamorgan	Rhondda Cynon Taff, part to Cardiff
Torfaen	Gwent	Torfaen
Vale of Glamorgan	South Glamorgan	Vale of Glamorgan
Wrexham Maelor	Clwyd	Wrexham