Trade is an unincorporated community in Johnson County, Tennessee, United States. The easternmost community in the state, Trade is located between the towns of Mountain City, Tennessee, and Boone, North Carolina, along US-421. Generally considered Tennessee's oldest community, Trade was established as a trading outpost in the 18th century, and was visited by English-speakers as early as 1673. At 3,133 feet, it is the highest community in Tennessee.