There are 4 US Post Offices in Jasper County serving a total of 13,754 residents equating to 3,439 residents per post office. It's estimated that approximately 21,953 packages are handled across the 4 county post offices annually. Jasper County is a county located in the U.S. state of Georgia. As of the 2010 census, the population was 13,900. The county seat is Monticello. Jasper County is part of the very large Atlanta-Sandy Springs-Roswell, GA Metropolitan Statistical Area."