Newlyn is a seaside town and fishing port in south-west Cornwall, England, United Kingdom. It is the largest fishing port in England. Newlyn lies on the shore of Mount's Bay and forms a small conurbation with the neighbouring town of Penzance. It is part of the Penzance civil parish. The principal industry is fishing, although there are also a variety of yachts and pleasure boats in the harbour, as Newlyn has become a popular holiday destination with pubs and restaurants.