Hall County is a county located in the US state of Georgia. As of the 2000 census, the population was 139,277. It is included in the Gainesville, Georgia, Metropolitan Statistical Area, which is also part of the greater Atlanta–Sandy Springs–Gainesville, Georgia-Alabama Combined Statistical Area. Explosive growth is evident, with the census for 2010 census showing a population of 179,684. Gainesville is the county seat and most populous city.
Hall County was created on December 15, 1818, from Cherokee lands ceded by the Treaty of Cherokee Agency (1817) and Treaty of Washington (1819).
The county is named for Dr. Lyman Hall, a signer of the Declaration of Independence and governor of Georgia as both colony and state.
According to the 2000 census, the county has a total area of 429.19 square miles (1,111.6 km2), of which 393.66 square miles (1,019.6 km2) (or 91.72%) is land and 35.53 square miles (92.0 km2) (or 8.28%) is covered by water.
The Chattahoochee River gathers strength in Hall County, as immortalized in Sidney Lanier's poem, "Song of the Chattahoochee":
OUT of the hills of Habersham,
Down the valleys of Hall,
I hurry amain to reach the plain,
Run the rapid and leap the fall,
Split at the rock and together again,