sullivan gardens is an unincorporated community in southwestern sullivan county, tennessee, located southwest of kingsport. since the 1990s, sullivan gardens has experienced a decline, due mainly to the construction of the sullivan gardens parkway, which re-routed highway 93, and resulted in traffic being routed around, rather than through, the town, leading to the eventual closure of a number of small businesses. prior to the late 1990s, there were a number of small, locally owned stores and businesses along the old highway 93 in the town of sullivan gardens, including gas stations, a plant nursery, pharmacy, and hardware store. all of these businesses are now closed and many of the buildings that housed them have been demolished or abandoned.