Davidson County is a county in the U.S. state of Tennessee. It is located in the heart of Middle Tennessee. As of the 2020 census, the population was 715,884, making it the 2nd most populous county in Tennessee. Its county seat is Nashville, the state capital and most populous city.

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.