Cornwall is a county in South West England. It is recognized as one of the Celtic nations, and is the homeland of the Cornish people. Cornwall is bordered to the north and west by the Atlantic Ocean, to the south by the English Channel, and to the east by the county of Devon, with the River Tamar forming the border between them. Cornwall forms the westernmost part of the South West Peninsula of the island of Great Britain. The southwesternmost point is Land's End and the southernmost is Lizard Point. Cornwall has a population of about 568,000 and an area of 3,563 km2 (1,376 sq. mi).

Cornwall is noted for its geology and coastal scenery. The north coast has many cliffs where exposed geological formations are studied. The area is noted for its wild moorland landscapes, its long and varied coastline, its attractive villages, its many place-names derived from the Cornish language, and its very mild climate.