Kingsport is a city in Sullivan and Hawkins counties in the U.S. state of Tennessee. It lies along the Holston River and had a population of 55,442 at the 2020 census. It is the largest city in the Kingsport–Bristol metropolitan area, which had 307,613 residents in 2020. The metro area is a component of the larger Tri-Cities region of Tennessee and Virginia, with a population of 508,260 in 2020.