Cornwall Council, known between 1889 and 2009 as Cornwall County Council, is the local authority which governs the non-metropolitan county of Cornwall in South West England. Since 2009 it has been a unitary authority, having taken over district-level functions when the county's districts were abolished. The non-metropolitan county of Cornwall is slightly smaller than the ceremonial county, which additionally includes the Isles of Scilly. The council has had a Conservative Party majority since the 2021 local elections. Its headquarters is Lys Kernow in Truro.

Cornish is a Southwestern Brittonic language of the Celtic language family. Along with Welsh and Breton, Cornish is descended from the Common Brittonic language spoken throughout much of Great Britain before the English language came to dominate. For centuries, until it was pushed westwards by English, it was the main language of Cornwall, maintaining close links with its sister language Breton, with which it was mutually intelligible, perhaps even as long as Cornish continued to be spoken as a vernacular. Cornish continued to function as a common community language in parts of Cornwall until the mid 18th century, and there is some evidence for traditional speakers of the language persisting into the 19th century.