Johnson City is a city in Washington, Carter, and Sullivan counties in the U.S. state of Tennessee. It is mostly in Washington County. The population is 71,046, making it the eighth largest city in Tennessee. During the American Civil War before 1869 the name of the town was briefly changed to "Haynesville" in honor of Confederate Senator Landon Carter Haynes.
Johnson City is the principal city of the Johnson City Metropolitan Statistical Area. It is also a component of the Johnson City–Kingsport–Bristol, Tennessee–Virginia Combined Statistical Area – commonly known as the "Tri-Cities" region. The CSA is the fifth-largest in Tennessee with an estimated 500,530 residents.