Tri-Cities Airport, is in Blountville, Tennessee, United States. It serves the Tri-Cities area of Northeast Tennessee and Southwest Virginia. The airport is governed by the Tri-Cities Airport Authority (TCAA) whose members are appointed by the cities of Johnson City, Kingsport, Bristol (TN), Bristol (VA) and both Washington and Sullivan counties in Tennessee.

Blountville is a census-designated place (CDP) in and the county seat of Sullivan County, Tennessee. The population was 3,074 at the 2010 census and 3,120 at the 2020 census. It is the only Tennessee county seat not to be an incorporated city or town.