Lighthouse]] Llandudno is a seaside resort and town in Conwy County Borough, Wales. In the 2001 UK census it had a population of 20,090 including that of Penrhyn Bay and Penrhynside, which are within the Llandudno Community. Llandudno, "Queen of the Welsh Resorts", a title first implied as early as 1864, is now the largest seaside resort in Wales, and lies on a flat isthmus of sand between the Welsh mainland and the Great Orme peninsula. Historically a part of Caernarfonshire, Llandudno was formerly in the district of Aberconwy within Gwynedd.