Morristown is a city in and the county seat of Hamblen County, Tennessee, United States. Morristown also extends into Jefferson County on the western and southern ends. The city lies within the Ridge and Valley of the Appalachians. The city's population was recorded to be 30,431 at the 2020 United States census. It is the principal city of the Morristown Metropolitan Statistical Area, which encompasses all of Grainger, Hamblen, and Jefferson counties. The Morristown metropolitan area is also part of the Knoxville-Morristown-Sevierville Combined Statistical Area.

Hamblen County is a county located in the U.S. state of Tennessee. As of the 2020 census, the population was 64,499. Its county seat and only incorporated city is Morristown. Hamblen County is the core county of the Morristown, Tennessee Metropolitan Statistical Area, which includes Hamblen, Jefferson, and Grainger counties. The county and the Morristown MSA are included in the Knoxville-Morristown-Sevierville, TN Combined Statistical Area.