There are 6 US Post Offices in Liberty County serving a total of 57,380 residents equating to 9,563 residents per post office. It's estimated that approximately 91,585 packages are handled across the 6 county post offices annually. Liberty County is a county located in the U.S. state of Georgia. As of the 2010 census, the population was 63,453. The county seat is Hinesville. Liberty County is part of the Hinesville, Georgia Metropolitan Statistical Area, which is also included in the Savannah-Hinesville-Statesboro, Georgia Combined Statistical Area."