There are 10 US Post Offices in Rutherford County serving a total of 203,579 residents equating to 20,358 residents per post office. It's estimated that approximately 324,935 packages are handled across the 10 county post offices annually. Rutherford County is a county located in the U.S. state of Tennessee. As of the 2010 census, the population was 262,604 and 288,906 in 2014, making it the fifth-most populous county in Tennessee. 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\u2013Murfreesboro\u2013Franklin, TN Metropolitan Statistical Area. Since the turn of the 21st century, it has been the destination of numerous immigrants, who have settled in the area, including many from Somalia and Kurds from Iraq. The proportion of ethnic minorities has risen slowly within the county."