Coordinates: 50°39′47″N 4°45′00″W / 50.663°N 4.750°W / 50.663; -4.750

Tintagel ( /tɪnˈtædʒəl/; Cornish: Dyntagell; originally Trevena from Cornish: Tre war Venydh) is a civil parish and village situated on the Atlantic coast of Cornwall, England, United Kingdom. The population of the parish is 1,820 people, and the area of the parish is 4,281 acres (17.32 km²).

The village and nearby Tintagel Castle are associated with the legends surrounding King Arthur and the knights of the Round Table. The village has, in recent times, become attractive to tourists and day-trippers from many parts of the world and is one of the most-visited places in Britain.

Toponymists have had difficulty explaining the origin of 'Tintagel': the probability is that it is Norman French as the Cornish of the 13th century would have lacked the soft 'g' ('i/j' in the earliest forms: see also Tintagel Castle). If it is Cornish then 'Dun' would = Fort (Oliver Padel proposes 'Dun' '-tagell' (narrow place) in his book on place name elements and may be right); there is a possible cognate form in the Channel Islands: Tente d'Agel, but that still leaves the question subject to doubt.)

King Arthur is a legendary British leader of the late 5th and early 6th centuries, who, according to medieval histories and romances, led the defence of Britain against Saxon invaders in the early 6th century. The details of Arthur's story are mainly composed of folklore and literary invention, and his historical existence is debated and disputed by modern historians. The sparse historical background of Arthur is gleaned from various sources, including the Annales Cambriae, the Historia Brittonum, and the writings of Gildas. Arthur's name also occurs in early poetic sources such as Y Gododdin.

The legendary Arthur developed as a figure of international interest largely through the popularity of Geoffrey of Monmouth's fanciful and imaginative 12th-century Historia Regum Britanniae (History of the Kings of Britain). Some Welsh and Breton tales and poems relating the story of Arthur date from earlier than this work; in these works, Arthur appears either as a great warrior defending Britain from human and supernatural enemies or as a magical figure of folklore, sometimes associated with the Welsh Otherworld, Annwn. How much of Geoffrey's Historia (completed in 1138) was adapted from such earlier sources, rather than invented by Geoffrey himself, is unknown.