From Old English Cornwealas (“inhabitants of Cornwall”), from corn- (compare Latin cornovii (“peninsula people”)) + Old English wealh (“stranger or foreigner”), itself from Proto-Germanic *walhaz (“foreigner, Celt”). Compare Wales/Welsh, Walloon, Gaul.
- A maritime county of England, forming its south-western extremity, bordered by Devon in the east.
- the country of the Cornish, currently having the status of a royal duchy in England, consisting at least of the Cornwall County and the Isles of Scilly
- A town in Connecticut
- A town in New York
- A city in Ontario
- A borough in Pennsylvania
- A town in Prince Edward Island
- A town in Vermont