Cornwall

            Cornwall, unitary authority and historic county, southwestern England, occupying a peninsula jutting into the Atlantic Ocean. Truro is the unitary authority’s administrative centre. The unitary authority covers nearly the same area as the historic county. However, the unitary authority includes an area extending west from Werrington along the River Otter that lies within the historic county of Devon, and it does not include the Isles of Scilly, in the Atlantic Ocean, which are part of the historic county of Cornwall but administratively are a unitary authority unto themselves.