Copperhill is a city in Polk County, Tennessee, United States. The population was 511 at the 2000 census. It is included in the Cleveland, Tennessee Metropolitan Statistical Area.
Copperhill is located at 34°59′32″N 84°22′27″W / 34.99222°N 84.37417°W / 34.99222; -84.37417 (34.992108, -84.374254), situated in extreme southeast Tennessee, bordering northwest Georgia.
Its twin city is McCaysville, Georgia, with the two situated as a single town aligned along the northwestward-flowing river rather than the east/west state line, which cuts diagonally across streets (where it is marked with a blue line) and through buildings. The main street through town is Ocoee Street (Tennessee 68), which becomes Toccoa Street (Georgia 60) to the east-southeast in McCaysville. A truss bridge over the river at the state line links them to Blue Ridge Drive (Georgia 5) to the south-southwest.