Smyrna is a town in Rutherford County, Tennessee. Smyrna's population was 53,070 at the 2020 census, making it the largest town in Tennessee by population in that census. In 2007, U.S. News & World Report listed Smyrna as one of the best places in the United States to retire. Smyrna is part of the Nashville metropolitan statistical area.

Rutherford County is a county located in the U.S. state of Tennessee. It is located in Middle Tennessee. As of a 2023 estimate, the population was 367,101, making it the fifth-most populous county in Tennessee. A study conducted by the University of Tennessee projects Rutherford County to become the third largest county in Tennessee by population by 2050. Its county seat is Murfreesboro, which is also the geographic center of Tennessee. As of 2010, it is the center of population of Tennessee. Rutherford County is included in the Nashville-Davidson–Murfreesboro–Franklin, TN Metropolitan Statistical Area.