Criccieth is a town and community on the Llŷn Peninsula in the Eifionydd area of Gwynedd in Wales. The town lies 5 miles west of Porthmadog, 9 miles east of Pwllheli and 17 miles south of Caernarfon. It had a population of 1,826 in 2001, reducing to 1,753 at the 2011 census.
The town is a seaside resort, popular with families. Attractions include the ruins of Criccieth Castle, which have extensive views over the town and surrounding countryside. Nearby on Ffordd Castell is Cadwalader's Ice Cream Parlour, opened in 1927, whilst Stryd Fawr has several bistro-style restaurants. In the centre lies Y Maes, part of the original medieval town common.
The town is noted for its fairs, held on 23 May and 29 June every year, when large numbers of people visit the fairground and the market which spreads through many of the streets of the town.
Famous people associated with the town include the British prime minister, David Lloyd George, who grew up in the nearby village of Llanystumdwy, and his nephew, the poet William George.