Liberty County is a county in the U.S. state of Georgia. As of the 2020 census, the population is 65,256. The county seat is Hinesville.

Hinesville is a city and county seat of Liberty County, Georgia, United States, located on the Atlantic coastal plain. The population was 33,437 at the 2010 census and an estimated 33,273 in 2019. By 2020, its population was 34,891. It is the principal city of the Hinesville metropolitan area, which comprises all of Liberty County, including the Fort Stewart army installation, plus neighboring Long County.