Meliden (Welsh: Gallt Melyd) is a village between Prestatyn and Dyserth in Denbighshire, Wales. It grew up around the locality of lead mines and limestone quarries. The placename "Meliden" has variously been claimed to be derived from that of Bishop Melitus or St. Melyd (the village has the church of St. Melyd as its main place of worship); its Welsh placename, "Gallt Melyd", means "wooded hill of Melyd". The railway between Prestatyn and Dyserth, long since lifted and formerly with sidings in the village, is now a public walkway and nature trek. It has a 9-hole golf course, which is split in half by the former railway/nature walk. The local school, St. Melyd Primary, is a feeder school to the High School, Prestatyn.
Above the village is the limestone hill of Graig Fawr (153 metres, 502 feet) which belongs to the National Trust. The views from the crag include the coast from Llandudno to the Wirral, Snowdonia, neighbouring Moel Hiraddug, and many other hills of North Wales.