Cornwall Cornwall Cornwall (; ) is a county in South West England in the United Kingdom. The county is bordered to the north and west by the Celtic Sea, to the south by the English Channel, and to the east by the county of Devon, over the River Tamar which forms most of the border between them. Cornwall forms the westernmost part of the South West Peninsula of the island of Great Britain. The furthest southwestern point of the island is Land's End; the southernmost point is Lizard Point. Cornwall has a population of and covers an area of . The
History of Cornwall same time (900 to 500 BCE), Celtic cultures and peoples spread across the British Isles. During the British Iron Age Cornwall, like all of Britain south of the Firth of Forth, was inhabited by Celts known as the Britons. The Celtic language spoken at the time, Common Brittonic, eventually developed into several distinct tongues, including Cornish. The first account of Cornwall comes from the Sicilian Greek historian Diodorus Siculus (c. 90 BCE – c. 30 BCE), supposedly quoting or paraphrasing the 4th-century BCE geographer Pytheas, who had sailed to Britain: Claims have been made that the Phoenicians traded directly with