There are 5 US Post Offices in Newton County serving a total of 85,419 residents equating to 17,084 residents per post office. It's estimated that approximately 136,338 packages are handled across the 5 county post offices annually. Newton County is a county located in the north central portion of the U.S. state of Georgia. As of the 2010 census, the population was 99,958. The county seat is Covington. Newton County is included in the Atlanta-Sandy Springs-Roswell, GA Metropolitan Statistical Area."