Glade Spring, Virginia. Glade Spring is a town in Washington County, Virginia, United States. The population was 1,456 at the 2010 census. It is part of the Kingsport–Bristol (TN)–Bristol (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. 1 History.