Mostyn is the name of one of the electoral wards in Llandudno, Conwy County Borough, Wales. It is one of five town wards and covers Llandudno town immediately west of the railway line. Gogarth ward lies to the northwest and Tudno ward lies to the east, with Llandudno beach to the north and Conwy Sands to the southwest. According to the 2011 UK Census the population of the ward was 3,639.