Johnson County is the easternmost county in the U.S. state of Tennessee. As of the 2020 census, the population was 17,948. Its county seat is Mountain City. Johnson County was created in 1836 from parts of Carter County. This followed several years of bickering over the location of Carter County's seat, with residents of what is now Johnson County arguin…
Johnson County is the easternmost county in the U.S. state of Tennessee. As of the 2020 census, the population was 17,948. Its county seat is Mountain City. Johnson County was created in 1836 from parts of Carter County. This followed several years of bickering over the location of Carter County's seat, with residents of what is now Johnson County arguing that travel to Elizabethton was too lengthy and difficult. When their petition to move the seat to a more central location was rejected, they petitioned the state legislature for the creation of a new county. The new county was named after Thomas Johnson, an early settler. The county seat was initially named "Taylorsville" in honor of Colonel James P. Taylor.