Johnson County is located in the Blue Ridge Mountains and is made up of many small towns and communities. It is the northeastern most county in the state sharing borders with Virginia and North Carolina. The county was created in 1836 from parts of Carter County and was named after Thomas Johnson, an early settler. Mountain City serves as the county seat and is the largest town in the county. The total area of the county is 303 square miles, with 298 square miles of land and 4.2 square miles of water. Mainly due to the remoteness of the area, the railroads did not reach Johnson County until the early 1900’s. The railroads greatly helped the development of the timber and manganese mining industries.