Llandudno, seaside resort, Conwy county borough, historic county of Denbighshire, northwestern Wales. It fronts Llandudno Bay, on the Irish Sea between the limestone headlands of Great Orme (northwest) and Little Orme (east).
Traces of prehistoric and Roman occupation have been found on Great Orme, whose summit—679 feet (207 metres) above the sea—is accessible by tramway, cable lift, road, and nature trail. Wild goats live on its slopes. There are caves around the base of Little Orme, which has an elevation of 463 feet (141 metres).
Set in a former fishing and copper-mining region, the town was developed around the railroad in the second half of the 19th century as an elegant, dignified resort characterized by wide boulevards and gracious Victorian buildings. There Charles Dodgson (Lewis Carroll) told Alice Liddell the stories on which he based Alice’s Adventures in Wonderland (1865). Llandudno in modern times has become somewhat commercialized and crowded with vacationers. Pop. (2001) 20,090; (2011) 20,701.