Senedd constituencies and electoral regions

A map of the 40 constituencies and the five electoral regions of Wales.

The Senedd, the unicameral parliament of Wales, has 40 single-member constituencies (Welsh: etholiadau) and five multi-member electoral regions (Welsh: rhanbarthau etholiadol).

The boundaries and names of the 40 constituencies are the same as those in the House of Commons in the Westminster Parliament.

Constituencies

Current constituencies

Constituency

(Welsh name)

Electoral population (March 2020)[1] Principal areas Electoral region
Aberavon

Welsh: Aberafan

51,450 Neath Port Talbot South Wales West
Aberconwy 45,426 Conwy North Wales
Alyn and Deeside

Welsh: Alun a Glannau Dyfrdwy

65,183 Flintshire; Wrexham North Wales
Arfon 43,125 Gwynedd North Wales
Blaenau Gwent 51,495 Blaenau Gwent South Wales East
Brecon and Radnorshire

Welsh: Brycheiniog a Sir Faesyfed

55,124 Powys Mid and West Wales
Bridgend

Welsh: Pen-y-bont ar Ogwr

64,245 Bridgend South Wales West
Caerphilly

Welsh: Caerffili

64,926 Caerphilly; Newport South Wales East
Cardiff Central

Welsh: Canol Caerdydd

63,017 Cardiff South Wales Central
Cardiff North

Welsh: Gogledd Caerdydd

69,143 Cardiff South Wales Central
Cardiff South and Penarth

Welsh: De Caerdydd a Phenarth

81,366 Cardiff South Wales Central
Cardiff West

Welsh: Gorllewin Caerdydd

69,511 Cardiff South Wales Central
Carmarthen East and Dinefwr

Welsh: Dwyrain Caerfyrddin a Dinefwr

58,048 Carmarthenshire Mid and West Wales
Carmarthen West and South Pembrokeshire

Welsh: Gorllewin Caerfyrddin a De Sir Benfro

59,924 Carmarthenshire; Pembrokeshire Mid and West Wales
Ceredigion 56,634 Ceredigion Mid and West Wales
Clwyd South

Welsh: De Clwyd

54,747 Denbighshire; Wrexham North Wales
Clwyd West

Welsh: Gorllewin Clwyd

58,024 Conwy; Denbighshire North Wales
Cynon Valley

Welsh: Cwm Cynon

51,461 Rhondda Cynon Taf South Wales Central
Delyn 55,604 Conwy; Flintshire North Wales
Dwyfor Meirionnydd 44,882 Gwynedd Mid and West Wales
Gower

Welsh: Gŵyr

62,763 Swansea South Wales West
Islwyn 56,841 Caerphilly South Wales East
Llanelli 62,196 Carmarthenshire; Swansea Mid and West Wales
Merthyr Tydfil and Rhymney

Welsh: Merthyr Tudful a Rhymni

57,883 Caerphilly; Merthyr Tydfil South Wales East
Monmouth

Welsh: Sir Fynwy

67,252 Monmouthshire South Wales East
Montgomeryshire

Welsh: Sir Drefaldwyn

49,691 Powys Mid and West Wales
Neath

Welsh: Castell-nedd

57,032 Neath Port Talbot South Wales West
Newport East

Welsh: Dwyrain Casnewydd

60,936 Newport South Wales East
Newport West

Welsh: Gorllewin Casnewydd

68,748 Newport South Wales East
Ogmore

Welsh: Ogwr

57,934 Rhondda Cynon Taf South Wales West
Pontypridd 60,923 Rhondda Cynon Taf South Wales Central
Preseli Pembrokeshire

Welsh: Preseli Sir Benfro

60,025 Pembrokeshire Mid and West Wales
Rhondda 50,471 Rhondda Cynon Taf South Wales Central
Swansea East

Welsh: Dwyrain Abertawe

60,726 Swansea South Wales West
Swansea West

Welsh: Gorllewin Abertawe

59,419 Swansea South Wales West
Torfaen 63,061 Torfaen South Wales East
Vale of Clwyd

Welsh: Dyffryn Clwyd

56,307 Denbighshire North Wales
Vale of Glamorgan

Welsh: Bro Morgannwg

77,204 Vale of Glamorgan South Wales Central
Wrexham

Welsh: Wrecsam

52,713 Wrexham North Wales
Ynys Môn 52,610 Isle of Anglesey North Wales

Former constituencies

Former constituency Preserved county Region of former constituency Replacement constituencies and regions
Caernarfon Gwynedd North Wales Arfon, North Wales electoral region
Dwyfor Meirionnydd, Mid and West Wales electoral region
Conwy Clwyd North Wales Arfon, North Wales electoral region
Gwynedd Aberconwy, North Wales electoral region
Meirionnydd Nant Conwy Clwyd Mid and West Wales Aberconwy, North Wales electoral region
Gwynedd Dwyfor Meirionnydd, Mid and West Wales electoral region

Electoral regions

Electoral region

(Welsh name)

Number of constituencies Constituencies

(ordered alphabetically)

Electoral population (March 2020)[1] Image

(numbered alphabetically)

Mid and West Wales

Welsh: Canolbarth a Gorllewin Cymru

8 Brecon and Radnorshire, Carmarthen East and Dinefwr, Carmarthen West and South Pembrokeshire, Ceredigion, Dwyfor Meirionnydd, Llanelli, Montgomeryshire, Preseli Pembrokeshire 446,524  
North Wales

Welsh: Gogledd Cymru

9 Aberconwy, Alyn and Deeside, Arfon, Clwyd South, Clwyd West, Delyn, Vale of Clwyd, Wrexham, Ynys Môn 483,739  
South Wales Central

Welsh: Canol De Cymru

8 Cardiff Central, Cardiff North, Cardiff South and Penarth, Cardiff West, Cynon Valley, Pontypridd, Rhondda, Vale of Glamorgan 523,096  
South Wales East

Welsh: Dwyrain De Cymru

8 Blaenau Gwent, Caerphilly, Islwyn, Merthyr Tydfil and Rhymney, Monmouth, Newport East, Newport West, Torfaen 491,142  
South Wales West

Welsh: Gorllewin De Cymru

7 Aberavon, Bridgend, Gower, Neath, Ogmore, Swansea East, Swansea West 413,569  

List of current electoral regions

Senedd Constituencies And Electoral Regions Media

Related pages

References

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