Trousdale County, also known as Hartsville/Trousdale County, is a county in the U.S. state of Tennessee. As of the 2020 census, the population was 11,615. Its county seat is Hartsville, with which it shares a uniquely formed consolidated city-county government. With an area of just 117 square miles (300 km2), it is Tennessee's smallest county.

Nashville is the capital and most populous city in the U.S. state of Tennessee and the county seat of Davidson County. Located in Middle Tennessee, it had a population of 689,447 at the 2020 U.S. census. Nashville is the 21st most populous city in the United States, and the fourth most populous city in the southeastern U.S. Located on the Cumberland River, the city is the center of the Nashville metropolitan area, and is one of the fastest growing in the nation.