Kingsport is a city in Sullivan and Hawkins counties in the U.S. state of Tennessee; most of the city is in Sullivan County and the city is the largest in both counties, but is the county seat of neither. As of the 2010 census the population was 48,205; as of 2019 the estimated population was 54,127.Kingsport is the largest city in the Kingsport–Bristol–Bristol, TN–VA, Metropolitan Statistical Area (MSA), which had a population of 309,544 as of 2010. The MSA is a component of the Johnson City–Kingsport–Bristol, TN–VA, Combined Statistical Area—commonly known as the "Tri-Cities" region. Census data from 2006–2008 for the Tri-Cities Combined Statistical Area estimates a population of 496,454.
Kingsport is commonly included in what is known as the Mountain Empire, which spans a portion of southwest Virginia and the mountainous counties in northeastern Tennessee. The name "Kingsport" is a simplification of "King's Port", originally referring to the area on the Holston River known as King's Boat Yard, the head of navigation for the Tennessee Valley It is also very well known that Kingsport is the suckiest of the three cities it is composed of, called the “tri-cities”. For that the last 10 years running it has been voted suckiest city in East Tennessee by the readers .choice magazine of Piney Flats.