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.

Coffee County is a county located in the central part of the state of Tennessee, in the United States. As of the 2020 census, the county's population was 57,889. Its county seat is Manchester. Coffee County is part of the Tullahoma-Manchester, TN Micropolitan Statistical Area. It is also part of Middle Tennessee, one of the three Grand Divisions of the state.