Mullion (Cornish: Eglosvelyan) is a civil parish and village on the Lizard Peninsula in south Cornwall, England, United Kingdom.

Mullion is bordered by the parishes of Gunwalloe and Cury to the north, Grade-Ruan to the east, Landewednack to the south, and by Mount's Bay to the west.

[5] Reference to early publications and the 1908 Ordnance Survey maps show that the parish church was officially known as St Melan's until at least the start of the 20th century.

[6][7] In the late 19th century, Edmund Harvey (1828–84), Vicar of Mullion, proposed that the parish took its name from 'Mellon' which he believed was an alias of Saint Malo.

[4] However, an area near one of the ancient chapel sites was known as St Malo's Moor in Harvey's time, and nearby were two fields known as Sampson's Crofts.

[13] The existence of a Celtic church here is indicated by the place-names Tremenehee (meaning "sanctuary town") and Lanfrowder (cognate with Lafrowda, the Cornish name of St Just in Penwith) nearby.

Robert Luddra (vicar 1512–47) was also provost of Glasney College; he increased the endowment of the vicarage, and contributed funds for the roofs and tower.

[16] Like many other Cornish coastal villages there was a pilchard fishery, controlled by seining companies which started in the 18th century out of Mullion Cove.

[24] Poldhu is the site of one of the main technological advances of the early twentieth century when in 1901, a wireless signal was sent to St John's, Newfoundland, by Marconi.

[1] The main village of Mullion is situated in the north of the parish, approximately 65 metres (210') above sea level and about 1 mile (2 km) inland of the coast which is to its west.

The geology of this part of the parish consists mainly of Hornblende Schists, only changing to slate north of Poldhu Cove.

Today Mullion is the largest village on the Lizard Peninsula and is a centre for local services and amenities as well as a popular tourist destination.

In contrast to the northern part of the parish this area remains as semi-natural heath, the growth of which is encouraged by the change in geology south of Mullion Cove to serpentinite.

The southern extent of the parish is marked by a steep, narrow river valley cut into the downs, meeting the sea at Kynance Cove.

[27] The principal local authority is Cornwall Council and an electoral ward with the same name covers the parish and the surrounding land to Lizard Point.