This is a list of places in Wales which have standing links to local communities in other countries known as "town twinning" (usually in Europe) or "sister cities" (usually in the rest of the world).
Abergavenny
Abergele
Abertillery
Aberystwyth
Bala
Bagillt
Bangor
Blackwood
Blaenavon
Blaenau Gwent
Brecknockshire
Brecon
Bridgend
Briton Ferry
Broughton and Bretton
Brynmawr
Caernarfon
Caerphilly
Caldicot
Cardiff
Cardigan
Carmarthen
Colwyn Bay
Cowbridge
Crickhowell
Crymych
Cwmaman
Cwmbran
Denbigh
Dolgellau
Fishguard and Goodwick
Flintshire
Glynneath
Gorseinon
Govilon
Gowerton
Haverfordwest
Hay-on-Wye
Holyhead
Holywell
Isle of Anglesey
Kidwelly
Llanberis
Llanbradach
Llandeilo
Llandovery
Llandrindod Wells
Llandudno
Llandybie
Llandysul
Llanelli
Llanfairfechan
Llangedwyn
Llanidloes
Llantrisant
Llantwit Major
Llanwrtyd Wells
Llwchwr
Machen
Machynlleth
Milford Haven
Monmouth
Monmouthshire
Mumbles
Narberth
Nefyn
Newcastle Emlyn
Newport
Newport, Pembrokeshire
Newtown
Neyland
Norton
Pembroke
Pembroke Dock
Penarth
Pencoed
Pontardawe
Pontarddulais
Pontypool
Porthcawl
Porthmadog
Presteigne
Radyr and Morganstown
Raglan
Rhondda Cynon Taf
Ruthin
St Asaph
St Clears
St Davids
St Dogmaels
Swansea
Torfaen
Tredegar
Tregaron
Usk
Vale of Glamorgan
Whitland
Wrexham
Ystradgynlais