There are 4 US Post Offices in Calhoun County serving a total of 7,998 residents equating to 2,000 residents per post office. It's estimated that approximately 12,766 packages are handled across the 4 county post offices annually. Calhoun County is a county located in the U.S. state of Georgia. As of the 2010 census, the population was 6,694. The county seat is Morgan. The county was created on February 20, 1854."