Penmaenmawr is a town and community in Conwy County Borough, Wales, which was formerly in the parish of Dwygyfylchi. It lies on the North Wales coast between Conwy and Llanfairfechan and was an important quarrying town, though this industry is no longer a major employer. The population of the community was 4,353 in 2011, including Dwygyfylchi and Capelulo.