County towns in Wales

Cardiff is the capital and largest city of Wales. Cardiff had a population of in and forms a principal area officially known as the City and County of Cardiff (). The city is the eleventh largest in the United Kingdom. Located in the southeast of Wales and in the Cardiff Capital Region, Cardiff is the county town of the historic county of Glamorgan and in 1974–1996 of South Glamorgan. It belongs to the Eurocities network of the largest European cities. A small town until the early 19th century, its prominence as a port for coal when mining began in the region helped its expansion. In 1905, it

Monmouth ( or ; ) is a market town and community in Monmouthshire, Wales, situated on where the River Monnow joins the River Wye, from the Wales–England border. The population in the 2011 census was 10,508, rising from 8,877 in 2001. Monmouth was the county town of historic Monmouthshire, although Abergavenny is the largest settlement and Monmouthshire County Council has its main offices at Rhadyr, just outside Usk. Monmouth is in the UK Parliament constituency of Monmouthshire and the Senedd constituency of Monmouth.

Carmarthen ( , ; , 'Merlin's fort' or possibly 'Sea-town fort') is the county town of Carmarthenshire and a community in Wales, lying on the River Towy north of its estuary in Carmarthen Bay. At the 2021 census the community had a population of 14,636, and the built up area had a population of 16,455. It stands on the site of a Roman town, and has a claim to be the oldest town in Wales. In the middle ages it comprised twin settlements: Old Carmarthen around Carmarthen Priory and New Carmarthen around Carmarthen Castle. The two were merged into one borough in 1546. It was the most populous boro

thumb|280px|Front page of the earliest surviving copy on The Brecon County Times, 5 May 1866

Aberaeron (), previously anglicised as Aberayron, is a seaside town and community in Ceredigion, Wales. Located on the coast between Aberystwyth and Cardigan, its resident population was 1,274 in the 2021 census.

town and community in Flintshire, Wales, UK

Haverfordwest ( , ; ) is the county town of Pembrokeshire, Wales, and the most populous urban area in Pembrokeshire with a population of 14,596 in 2011. It is also a community consisting of 12,042 people, making it the second most populous community in the county after Milford Haven. The suburbs include the former parish of Prendergast, Albert Town and the residential and industrial areas of Withybush (housing, retail parks, hospital, airport and showground).

Ruthin ( ; ) is a market town and community in Denbighshire, Wales, in the south of the Vale of Clwyd. The town, castle and St Peter's Square lie on a hill, skirted by villages such as and . The name comes from the Welsh ('red') and ('fort'), after the colour of sandstone bedrock, from which the castle was built in 1277–1284. The Old Mill, Ruthin, is nearby. , a registered ancient monument associated with King Arthur and with , the brother of the historian Gildas, stands in St Peter's Square.

) is the county town of Anglesey in Wales. At the 2011 census, Llangefni's population was 5,116, making it the second-largest town in the county and the largest on the island. The community includes the village of Rhosmeirch. In 2022, population was 7,039 people.

town and community in Powys, Wales, UK

Dolgellau (; ) is a town and community in Gwynedd, north-west Wales, lying on the River Wnion, a tributary of the River Mawddach. It was the traditional county town of the historic county of Merionethshire until the county of Gwynedd was created in 1974. Dolgellau is the main base for climbers of Cadair Idris and Mynydd Moel which are visible from the town. Dolgellau is the second largest settlement in southern Gwynedd after Tywyn and includes the community of Penmaenpool. in 2021 the population dropped to 2,602.

county town of Montgomeryshire, now in Powys, Wales, UK