There are 4 US Post Offices in Spalding County serving a total of 36,824 residents equating to 9,206 residents per post office. It's estimated that approximately 58,775 packages are handled across the 4 county post offices annually. Spalding County is a county located in the west central portion of the U.S. state of Georgia. As of the 2010 census, the population was 64,073. The county seat is Griffin. The county was created December 20, 1851 and named for former United States representative and senator Thomas Spalding. Spalding County county is included in the Atlanta-Sandy Springs-Roswell, GA Metropolitan Statistical Area."