Scott County is a county located in the far southwestern part of the U.S. state of Virginia, on the border with Tennessee. As of the 2020 census, the population was 21,576. Its county seat is Gate City. Scott County was formed by an act of the General Assembly on November 24, 1814, from parts of Washington, Lee, and Russell counties and was named for Virginia -born General Winfield Scott. Scott County is part of the Kingsport–Bristol–Bristol, TN-VA Metropolitan Statistical Area, which is a component of the Johnson City–Kingsport–Bristol, TN-VA Combined Statistical Area, commonly known as the "Tri-Cities" region. The County Administrator is Freda Russell Starnes.

The Tri-Cities is the region comprising the cities of Kingsport, Johnson City, and Bristol and the surrounding smaller towns and communities in Northeast Tennessee and Southwest Virginia. All three cities are located in Northeast Tennessee, while Bristol has a twin city of the same name in Virginia.