Ramsey Island is an island about 1 km off the coast of the St David's peninsula in Pembrokeshire on the northern side of St Brides Bay, in southwest Wales. In Welsh the island is named after Saint David (Dewi Sant), the patron saint of Wales. It was the home of his confessor, Saint Justinian. The nearest town, strictly a city, is St David's. Ramsey Island is less than 3.2 km (2 mi) long and its highest point is 136 metres (446 ft) above sea level at Carnllundain. It is the third largest island in Wales, after Anglesey and Holy Island. and the largest offshore island.