Llandudno (lænˈdɪdnoʊ, ɬanˈdɨdnɔ) is a seaside resort, town and community in Conwy County Borough, Wales, located on the Creuddyn peninsula, which protrudes into the Irish Sea. In the 2011 UK census, the community – which includes Gogarth, Penrhyn Bay, Craigside, Glanwydden, Penrhynside, and Bryn Pydew – had a population of 20,701. The town's name means "Church of Saint Tudno".
Llandudno is the largest seaside resort in Wales, and as early as 1861 was being called 'the Queen of the Welsh Watering Places' (a phrase later also used in connection with Tenby and Aberystwyth; the word 'resort' came a little later). Historically a part of Caernarfonshire, Llandudno was formerly in the district of Aberconwy within Gwynedd.
The town of Llandudno developed from Stone Age, Bronze Age and Iron Age settlements over many hundreds of years on the slopes of the limestone headland, known to seafarers as the Great Orme and to landsmen as the Creuddyn Peninsula. The origins in recorded history are with the Manor of Gogarth conveyed by King Edward I to Annan, Bishop of Bangor in 1284. The manor comprised three townships, Y Gogarth in the south-west, Y Cyngreawdr in the north (with the parish church of St Tudno) and Yr Wyddfid in the south-east.
Modern Llandudno takes its name from the ancient parish of Saint Tudno but also encompasses several neighbouring townships and districts including Craig-y-Don, Llanrhos and Penrhyn Bay. Also nearby is the small town and marina of Deganwy and these last four are in the traditional parish of Llanrhos. The ancient geographical boundaries of the Llandudno area are complex: although they are on the eastern side of the River Conwy (the natural boundary between north-west and north-east Wales), the ancient parishes of Llandudno, Llanrhos and Llangystennin (which includes Llandudno Junction) were in the medieval commote of Creuddyn in the Kingdom of Gwynedd, and afterwards part of Caernarfonshire. Today, Deganwy and Llandudno Junction are part of the town community of Conwy even though they are across the river and only linked to Conwy by a causeway and bridge.