There are 9 US Post Offices in Carroll County serving a total of 102,185 residents equating to 11,354 residents per post office. It's estimated that approximately 163,099 packages are handled across the 9 county post offices annually. Carroll County is a county located in the northwestern part of the State of Georgia. As of the 2010 census, its population was about 110,527. Its county seat is the town of Carrollton. Carroll County is included in the Atlanta-Sandy Springs-Roswell, GA Metropolitan Statistical Area. It is located just east of the boundary with Alabama."