The following is a list of built-up areas in Wales by population according to the 2021 and 2011 Census. 2021 This is a list of built-up areas as of the 2021 census.Within the dataset under 1d. Over 10,000 Built-up area Welsh namePopulation Cardiff Caerdydd 348,535 Swansea Abertawe 170,085 Newport Casnewydd 130,890 Barry Y Barri 56,605 Bridgend Pen-y-bont 51,760 Cwmbran Cwmbrân 47,090 Wrexham Wrecsam 44,785 Llanelli Llanelli 42,155 Neath Castell-nedd 40,730 Merthyr Tydfil Merthyr Tudful 39,535 Aberdare Aberdâr 37,675 Caerphilly Caerffili 33,105 Pontypridd Pontypridd 31,900 Port Talbot Port Talbot 31,555 Colwyn Bay Bae Colwyn 29,275 Pontypool Pont-y-pŵl 29,070 Penarth Penarth 28,395 Rhyl Y Rhyl 26,990 Ebbw Vale Glynebwy 19,630 Maesteg Maesteg 18,335 Tonypandy Tonypandy 17,210 Bangor Bangor 16,990 Connah's Quay Cei Connah 16,770 Prestatyn Prestatyn 16,675 Carmarthen Caerfyrddin 16,455 Porthcawl Porthcawl 15,795 Conwy Conwy 15,715 Risca Rhisga 15,195 Llandudno Llandudno 14,710 Aberystwyth Aberystwyth 14,640 Tredegar Tredegar 14,530 Hawarden Penarlâg 14,280 Milford Haven Aberdaugleddau 14,250 Church Village Pentre'r Eglwys 14,155 Gorseinon Gorseinon 14,110 Pyle Y Pîl 14,075 Abergavenny Y Fenni 13,695 Buckley Bwcle 13,560 Porth Y Porth 13,350 Rhondda Cwm Rhondda 13,265 Mountain Ash Aberpennar 13,000 Rhosllanerchrugog Rhosllanerchrugog 12,785 Flint Y Fflint 12,780 Blackwood Coed Duon 12,620 Haverfordwest Hwlffordd 12,085 Chepstow Cas-gwent 11,935 Sarn Sarn 11,870 Ystrad Mynach Ystrad Mynach 11,855 Holyhead Caergybi 11,755 Tonyrefail Tonyrefail 11,440 Newtown (Powys) Y Drenewydd 10,885 Baglan Baglan 10,510 Monmouth Trefynwy 10,325 Abertillery Abertyleri 10,245 Under 10,000 Built-up area Population Mold9,890 Caernarfon 9,835 Caldicot 9,815 Pembroke Dock9,655 Pontllanfraith 9,360 Brynteg (Wrexham) 9,225 Pencoed9,115 Kinmel Bay 9,020 Abergele 8,535 Clydach (Swansea) 8,445 Ammanford 8,285 Brecon 8,255 Llanharan and Brynna 8,105 Denbigh 8,075 Bargoed 8,035 Pembroke 7,965 Dinas Powys 7,890 Ystalyfera 7,830 Holywell (Flintshire) 7,735 Treorchy 7,650 Newbridge 7,585 Rogerstone 7,550 Abersychan 7,495 Gowerton 7,445 Beddau 7,350 Caerleon 7,330 Gwersyllt 7,110 Acrefair and Cefn Mawr 6,905 Rhoose 6,780 Broughton (Flintshire) 6,530 Pontarddulais 6,515 Shotton 6,500 Bedwas 6,460 Abercynon 6,375 Cross Hands and Pen-y-groes 6,340 Oakdale 6,130 Bagillt 5,945 Pontyclun 5,800 Undy and Magor 5,740 Ruthin 5,700 Abertridwr and Senghenydd 5,640 Blaenavon 5,640 Pontardawe 5,540 Welshpool 5,455 Llandrindod Wells 5,430 Treherbert 5,425 Llantwit Major 5,345 Llangefni 5,260 Brynmawr 5,250 Abercarn 5,125 Treharris 5,045 Rhymney 4,995 Burry Port 4,965 Gresford 4,945 Coedpoeth 4,740 Mynydd Isa 4,735 Llay 4,665 Loughor 4,630 Ynysybwl 4,580 Blaina 4,555 Nantyglo 4,545 Cwmafan (Cwmavon) 4,525 Hope (Flintshire) 4,420 Aberbargoed 4,415 Ferndale 4,300 Llangennech 4,280 Nelson (Caerphilly) 4,240 Llantrisant 4,200 Penrhyn Bay 4,200 Tenby 4,090 Tumble 4,040 Ystradgynlais 4,030 Chirk 3,935 Glynneath 3,925 Glanamman 3,865 Penyffordd 3,825 Rhuddlan 3,790 Penpedairheol 3,785 Troed-y-rhiw and Pentrebach 3,775 Cardigan 3,765 Llanbradach 3,765 Bethesda 3,755 Llanharry 3,750 Cowbridge 3,645 Pwllheli 3,620 Penllergaer 3,580 Taff's Well 3,555 Tylorstown and Pontygwaith 3,550 Llanfairfechan 3,545 Bishopston 3,535 St Asaph 3,485 Blaenau Ffestiniog 3,450 Fishguard 3,420 Ruabon 3,410 Eglwys Brewis 3,300 Talbot Green 3,290 New Tredegar 3,285 Neyland 3,250 Amlwch 3,150 Tywyn 3,135 Fleur-de-lis and Pengam 3,100 Ogmore Vale 3,100 Llangollen 3,050 Menai Bridge 3,045 Hendy and Fforest 2,995 Knighton 2,910 Langstone 2,910 Llanfairpwllgwyngyll 2,905 Aston (Flintshire) 2,845 Maerdy 2,840 Kidwelly 2,765 Penmaenmawr 2,760 Rhostyllen 2,760 Gwaun-Cae-Gurwen 2,745 Boverton 2,740 Alltwen 2,720 Tonna 2,665 Brynamman 2,635 Builth Wells 2,620 Dolgellau 2,600 Porthmadog 2,575 Llandybie 2,560 Rhos 2,560 Saundersfoot 2,515 Cwm 2,505 Lampeter 2,505 Tycroes 2,480 Llanrwst 2,465 Llanhilleth 2,450 Hendreforgan 2,445 Aberfan 2,430 Garden City 2,425 Pontycymer 2,425 Marshfield (Newport) 2,385 Nant-y-moel 2,375 Pentyrch 2,375 Narberth 2,365 Y Felinheli 2,330 Usk 2,310 Creigiau 2,300 Pen-y-fai 2,300 Bettws 2,240 Tanyfron 2,230 Merlin's Bridge 2,220 Llanidloes 2,200 Trimsaran 2,190 Gilwern 2,185 Cilfrew 2,180 Machynlleth 2,160 Resolven 2,160 Underwood 2,135 Crickhowell 2,110 Maesycwmmer 2,095 Pembrey 2,095 Benllech 2,075 Hay-on-Wye 2,065 Dyserth 2,040 Goodwick 2,020 Trelewis 2,020 Llanfoist 2,005 Valley 2,005 Meliden 2,000 Bala (Y Bala) 1,990 Barmouth 1,985 Machen 1,985 Rossett 1,975 Leeswood 1,950 Southgate 1,935 Presteigne 1,930 Whitland 1,905 Tongwynlais 1,845 Llanberis 1,840 Newcastle Emlyn 1,840 Rhayader 1,835 Pontlottyn 1,830 Northop Hall 1,825 Pentre Maelor 1,815 Penygroes 1,795 Rogiet 1,790 St Clears 1,790 Llandeilo 1,785 Blaengarw 1,780 Bodelwyddan 1,780 Johnston 1,770 Llanbadarn Fawr 1,765 Criccieth 1,735 Dunvant 1,730 Higher Kinnerton 1,730 Bryn (Carmarthenshire) 1,725 Swffryd 1,720 Trethomas 1,715 Sychdyn (Soughton) 1,695 Glan Conwy (Llansanffraid Glan Conwy) 1,665 Crynant 1,660 Penclawdd 1,655 Portskewett 1,625 St Athan 1,595 Llanrug 1,535 Gilfach Goch 1,530 Caerwent 1,525 Trinant 1,505 Pontyberem 1,485 Pont Rhyd-y-cyff 1,480 Pontyates 1,475 Three Crosses 1,475 Four Crosses (Powys) 1,465 Penrhyndeudraeth 1,460 Llandovery 1,455 Markham 1,445 Gelligaer 1,435 Abertysswg 1,425 Tir-y-berth and Glan-y-nant 1,410 Carway 1,400 Dwygyfylchi 1,400 Penperlleni 1,395 Trevor 1,395 Clwt-y-bont 1,385 Penrhyn-coch 1,380 Cefn Cribwr 1,375 Ogmore-by-Sea 1,355 Cwmfelinfach 1,350 Mynydd Marian 1,350 St Davids 1,350 Cwmllynfell and Ystradowen 1,345 Seven Sisters 1,345 Govilon 1,340 Pensarn 1,330 Llandysul 1,320 Bradley (Wrexham) 1,315 Pwll 1,305 Wooden 1,300 Croeserw 1,295 Nefyn 1,290 Gaerwen 1,280 Coedhirwaun 1,270 Harlech 1,260 Ponthir 1,260 Talgarth 1,255 Tregarth 1,255 Kilgetty 1,245 Bodedern 1,195 Llanybydder 1,180 Raglan 1,175 Penybanc 1,165 Guilsfield 1,160 Llannerch-y-medd 1,155 Grovesend 1,150 Capel Hendre 1,145 Fochriw 1,145 Wenvoe 1,130 Beaumaris 1,120 Llanfyllin 1,120 Borth 1,115 Wattstown 1,105 Bow Street 1,100 Bedlinog 1,095 Llanddulas 1,095 Bethel 1,090 Holt (Wrexham) 1,085 Pentre Halkyn 1,080 Aberporth 1,075 Cwmgwrach 1,070 Crundale 1,065 Pencader 1,060 New Quay 1,045 Aberaeron 1,040 Marchwiel 1,040 Llangynidr 1,035 Northop 1,030 Cemaes 1,025 Llangeinor 1,015 St Dogmaels 1,015 Llandegfan 1,000 Pont Henri 990 Ynysddu 990 Gronant 985 Cwmann 975 Cilgerran 970 Llanfair Caereinion 970 Montgomery 965 Crofty 960 Caerwys 955 Glyncorrwg 955 Treuddyn 950 Upper Killay 935 Trearddur 930 Trefnant 930 Waunfawr 930 Wick (Vale of Glamorgan) 925 Abermule 920 Gwernymynydd 920 Overton (Wrexham) 910 Saron (Llandybie) 910 Tircoed 910 Gwernaffield (Gwernaffield-y-Waun) 905 Llan Ffestiniog 905 Rachub 895 Mostyn 890 New Brighton 890 Craig-cefn-parc 885 Hook (Pembrokeshire) 885 Sageston 885 Llechryd 880 Tregaron 880 Ferryside 865 Tregynon 865 Broad Haven 855 Henllan 855 Llanbedrog 840 Llanddaniel Fab 840 Newborough (Isle of Anglesey) 840 Pen-y-ffordd 840 Castleton (Newport) 835 Letterston 835 Llannon (Carmarthenshire) 835 Cosheston 830 Glais 830 Groeslon 825 Pontrhydyfen 825 Abergwynfi 820 Bontnewydd 820 Llangwm 820 Llansantffraid-ym-Mechain 815 Nantgarw 815 Penally 810 Ystradowen 805 St Florence 800 Bwlchgwyn 795 Kerry 795 Pant-yr-Awel and Lewistown 790 Pwll-trap 790 Trelales 790 Forden 785 Rhosneigr 785 Bangor-on-Dee 780 Crymych 780 Pantymwyn 775 Templeton 765 Church Stoke 755 Clyro 755 St Brides Major 755 Dyffryn Ardudwy 740 Talysarn 740 Tremadog 735 Llanilar 730 Parc-Seymour 730 Penley 730 Abercraf (Abercrave) 725 Waungilwen 720 Dyffryn Cellwen 715 Bryn Du 710 Laugharne 710 Groes-faen 705 St. Arvans 705 Dwyran 700 Foelgastell 695 Flint Mountain 690 Garnant 690 Clynderwen (Clunderwen) 685 Fairbourne 680 Llanon 665 Minera 665 Brynsadler 655 Brynsiencyn 655 Solva 655 St Nicholas 655 Jameston 645 Lamphey 645 Tal-y-bont (Ceredigion) 645 Five Roads 640 Llanddona 640 Blackmill 630 Llangattock 630 Sudbrook 630 Trelogan 630 Lixwm 625 Rosemarket 625 Ystrad Aeron 625 Colwinston 620 Abersoch 615 Llanfechell 615 Cynwyd 610 Moelfre 605 Bryncrug 600 Froncysyllte 600 New Hedges and Twy Cross 600 Penysarn 600 Pontlliw 595 Efail Isaf 590 Deri 585 Bryn (Neath Port Talbot) 570 Caersws 570 Llangoed 570 Newport (Pembrokeshire) 565 Heol-y-Cyw 560 Llanwrtyd Wells 560 Bronllys 550 Rhostrehwfa 550 Rhosesmor 545 Aberdyfi (Aberdovey) 540 Llandinam 535 Nant-y-Patrick 530 Abergwili 525 Pentraeth 525 Brawdy 520 Rhydymwyn 520 Llwyngwril 515 Sennybridge 515 Cymmer 510 Ffairfach 510 Brynteg (Isle of Anglesey) 505 Ffynnongroew (Ffynnongroyw) 495 Dinas Cross 485 Llanarth (Ceredigion) 485 Penparc 485 Roch 485 Spittal (Pembrokeshire) 480 Argoed 475 Llandissilio 475 Morfa Bychan 475 Llandogo 470 Llangristiolus 470 Tal-y-bont (Gwynedd) 470 Hundleton 460 St Ishmaels 455 Ludchurch 450 Trefor 450 Bryngwran 445 Llanrhaeadr-ym-Mochnant 445 Glyn Ceiriog 435 Pentre Berw 435 Arddleen 430 Corntown 430 Corwen 430 Dolgarrog 430 Llangibby 425 Llangors 425 Morfa Nefyn 425 St Donats 425 Penrhyn-side 420 Bonvilston 415 Llanmaes 415 Blaenau and Cae'r-bryn 410 Llandevaud 410 Llansteffan 410 Reynoldston 410 Parc-llyn 405 South Cornelly 400 Cilcain 395 Broadstreet Common 390 Bryn Pydew 390 Catbrook 385 Gwalchmai 385 Caergeiliog 380 Norton (Powys) 375 Pontneddfechan 375 Talacre 370 Gwespyr 365 Rhosybol 365 The Narth 365 Bancffosfelen 360 Trefriw 360 Cribyn 355 Gorsedd 355 Llandre 355 Llanrhystud 355 Begelly 350 Llanllyfni 350 Peniel 350 Tallarn Green 350 Bwlch 345 Llangernyw 345 Crossgates (Powys) 340 Cwm-twrch Uchaf 340 Llanbedr 340 Tavernspite 335 Tintern 335 Llandygai 330 Clydach (Monmouthshire) 325 Simpson Cross 325 Waunllapria 325 Carmel 320 Mynydd-y-Garreg 320 Cenarth 315 Henfynyw 315 Trawsfynydd 315 Cross Inn 310 Llansannan 310 Pontrhydfendigaid 310 Rhostryfan 310 Three Cocks 310 Drefach 305 Llanwern 305 Betws yn Rhos 300 Whitehill (Pembrokeshire) 300 Bronwydd 295 Newbridge-on-Wye 295 Berriew 290 Bull Bay 290 Coelbren 290 Gwynfryn 290 St Fagans 290 Keeston 285 Manorbier 285 Shirenewton 285 Clawdd Poncen 280 Llanyre 280 Meidrim 280 Malltraeth 275 Waterston 275 Llanigon 265 Broadmoor 260 Hill Mountain 260 Capel Bangor 255 Llanfechain 255 Pentrecwrt 255 Caeathro 250 Freshwater East 250 Penisa'r Waun 235 Betws-y-Coed 215 Port Eynon 215 Pendine 170 Llanelwedd 130 Blaenannerch 125 Llandarcy 115
2011