There are 31 US Post Offices in Mecklenburg County serving a total of 1,068,417 residents equating to 34,465 residents per post office. It's estimated that approximately 1,705,313 packages are handled across the 31 county post offices annually. Mecklenburg County is a county located on the border in the southwestern part of the state of North Carolina, in the United States. As of the 2010 census, the population was 919,628. It increased to 1,034,070 as of the 2015 estimate, making it the most populated county in North Carolina. Its county seat and largest city is Charlotte. Mecklenburg County is included in the Charlotte-Concord-Gastonia, NC-SC Metropolitan Statistical Area. On September 12, 2013, the county welcomed its one millionth resident. Growth has been positive, with its own challenges."