Penmaenmawr is a town and community in Conwy County Borough, Wales, which was formerly in the parish of Dwygyfylchi and the traditional county of Caernarfonshire. It is on the North Wales coast between Conwy and Llanfairfechan and was an important quarrying town, though quarrying is no longer a major employer. The population of the community was 4,353 in 2011, including Dwygyfylchi and Capelulo. The town itself having a population of 2,868 (2011).