Newlyn (Cornish: Lulynn) is a seaside town and fishing port in south-west Cornwall, England, United Kingdom.

Newlyn lies on the shore of Mount's Bay and forms a small conurbation with the neighbouring town of Penzance.

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.

Although the parish is now listed under Penzance, there is an electoral ward in separate existence called Mousehole, Newlyn and St Buryan.

[5] A plaque on the quay reads: To the memory of Bill Best Harris 1914 – 1987 Historian and son of Plymouth whose researches indicated that the MAYFLOWER 16 – 8 – 1620 docked at the Old Quay Newlyn for water and supplies making it the last port of call in England  The water supply at Plymouth being the cause of fever and cholera in the city  Let debate begin[6]In 1755, the Lisbon earthquake caused a tsunami to strike the Cornish coast more than 600 miles (970 km) away from the epicentre.

The 19th-century French writer, Arnold Boscowitz, claimed that "great loss of life and property occurred upon the coasts of Cornwall".

[15] In 1937, the fishing vessel Rosebud sailed to London to deliver a petition to the Minister of Health on behalf of those villagers whose homes were threatened under the government's slum clearance scheme.

During the Second World War Newlyn was a base for the Air Sea Rescue craft covering the Western Approaches.

[16] Reporting the event on the "Germany Calling" propaganda broadcast Lord Haw-Haw announced that the Luftwaffe had sunk a British cruiser in Newlyn Harbour.

The 2014 LP Cornish Pop Songs by indie band the Hit Parade contains several songs referencing Newlyn fishing industry including "The Ghost of the Fishing Fleet", a comment on the declining investment in the area, neglect by central government and the recent influx in tourist trade.

[17][18] Newlyn, along with nearby Mousehole and Paul, was the last stronghold of the Cornish language, presumably due to the strength of its fishing fleet.

Subsequently, several antiquarians including Prince Louis Lucien Bonaparte,[20] Daines Barrington, Georg Sauerwein and Henry Jenner who all collected Cornish writings or sayings, and the latter two became proficient in its use.

[21] Penzance Municipal Borough was itself abolished in 1974 under the Local Government Act 1972, and Newlyn became part of the new Penwith District.

The company based in the Old Pilchard Works today are major supplies of Cornish sardines and mixed-species fish.

The current largest collection of work by the Newlyn School is held by Penlee House Gallery and Museum in nearby Penzance.