Duff is an

unincorporated community An unincorporated area is a parcel of land that is not governed by a local general-purpose municipal corporation. (At p. 178.) They may be governed or serviced by an encompassing unit (such as a county) or another branch of the state (such as th ...

and

coal town A coal town, also known as a coal camp or patch, is a type of company town or mining community established by the employer, a mining company, which imports workers to the site to work the mineral find. The company develops it and provides reside ...

in Campbell County,

Tennessee Tennessee (, ), officially the State of Tennessee, is a landlocked U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders Kentucky to the north, Virginia to the northeast, North Carolina t ...

References

Unincorporated communities in Campbell County, Tennessee Unincorporated communities in Tennessee Coal towns in Tennessee {{CampbellCountyTN-geo-stub