mini|300px|Større byar avmerkte på eit kart over Wales. Byar i Wales gjev eit oversyn over større og mindre byar i Wales, ei eining i Storbritannia.
Wales har fem offisielle storbyar (city): Cardiff, Swansea, Newport, Bangor og St Davids.Cities in Wales, townscountiespostcodes.co.uk Dei fem største tettstadene i landsdelen er Cardiff, Swansea, Newport, Rhondda og Barry.List of Biggest Cities in Wales in United Kingdom, gomapper.com
I lista under er storbyane (city) merkte med utheva skrift.
A Aberaeron, Aberavon, Aberbargoed, Abercarn, Aberdare, Abergavenny, Abergele, Abertillery, Aberystwyth, Amlwch, Ammanford
B Bala, Bangor, Bargoed, Barmouth, Barry, Beaumaris, Bethesda, Blaenau Ffestiniog, Blaenavon, Blackwood, Blaina, Brecon, Bridgend, Briton Ferry, Brynmawr, Buckley, Builth Wells, Burry Port
C Caernarfon, Caerphilly, Caerwys, Caldicot, Cardiff, Cardigan, Carmarthen, Chepstow, Chirk, Cilgerran, Colwyn Bay, Connah's Quay, Conwy, Corwen, Cowbridge, Criccieth, Crickhowell, Crumlin, Cwmbran
D Denbigh, Dolgellau
E Ebbw Vale, Ewloe
F Fishguard, Flint, Ferndale
G Glynneath, Goodwick, Gorseinon
H Harlech, Haverfordwest, Hay-on-Wye, Holyhead, Holywell
K Kidwelly, Knighton
L Lampeter, Laugharne, Llandeilo, Llandovery, Llandrindod Wells, Llandudno, Llandudno Junction, Llandysul, Llanelli, Llanfair Caereinion, Llanfairfechan, Llanfyllin, Llangefni, Llangollen, Llanidloes, Llanrwst, Llantrisant, Llantwit Major, Llanwrtyd Wells, Llanybydder, Loughor, Llanfair
M Machynlleth, Maesteg, Menai Bridge, Merthyr Tydfil, Milford Haven, Mold, Monmouth, Montgomery, Mountain Ash Mochdre
N Narberth, Neath, Nefyn, Newbridge, Newcastle Emlyn, Newport, Newport (Pembrokeshire), New Quay, Newtown, Neyland
O Old Colwyn
P Pembroke, Pembroke Dock, Penarth, Pencoed, Penmaenmawr, Pontardawe, Pontypool, Pontypridd, Porth, Porthcawl, Porthmadog, Port Talbot, Prestatyn, Presteigne, Pwllheli
Q Queensferry
R Rhayader, Rhuddlan, Rhyl, Rhymney, Ruthin, Risca
S St Asaph, St Clears, St David's, Saltney, Shotton, Swansea
T Talgarth, Templeton, Tenby, Tondu, Tonypandy, Towyn, Tredegar, Treharris, Tregaron, Tywyn
U Usk
W Welshpool, Whitland, Wrexham
Y Ystradgynlais, Ystrad Mynach
Bakgrunnsstoff
Kjelder Denne artikkelen bygger på «List of towns in Wales» frå , den 8. juli 2011.