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is a census-designated place (CDP) in Carter County, Tennessee, United States. The population was 1,160 at the 2000 census. It is part of the Johnson City Metropolitan Statistical Area, which is a component of the Johnson City–Kingsport–Bristol, TN-VA Combined Statistical Area – commonly known as the "Tri-Cities" region.
Roan Mountain is located in northeast Tennessee at (36.194219, -82.068417). The elevation at Roan Mountain varies from in the center of the CDP to at the alpine summit of Roan Mountain, away by air.
According to the United States Census Bureau, the CDP has a total area of 7.4 square miles (19.2 km²).
The Doe River flows from the northern slopes of Roan Mountain, through Roan Mountain State Park and the center of town, and into the confluence with the Watauga River at Elizabethton.
Bakersville, North Carolina is found on the opposite (southern) side of Roan Mountain and the Tennessee-North Carolina state line.